diff --git a/CHANGES.md b/CHANGES.md
index 7201c75850..1652443c63 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -3,6 +3,7 @@ Changes in Element 1.1.5 (2021-XX-XX)
 
 Bugfix 🐛:
  - Fix crash during Realm migration
+ - Fix crash when playing video (#3179)
 
 Changes in Element 1.1.4 (2021-04-09)
 ===================================================
diff --git a/vector/src/main/java/im/vector/app/core/glide/VectorGlideModelLoader.kt b/vector/src/main/java/im/vector/app/core/glide/VectorGlideModelLoader.kt
index cbc5effe44..fb2f59d6b5 100644
--- a/vector/src/main/java/im/vector/app/core/glide/VectorGlideModelLoader.kt
+++ b/vector/src/main/java/im/vector/app/core/glide/VectorGlideModelLoader.kt
@@ -28,8 +28,10 @@ import com.bumptech.glide.signature.ObjectKey
 import im.vector.app.core.extensions.vectorComponent
 import im.vector.app.core.files.LocalFilesHelper
 import im.vector.app.features.media.ImageContentRenderer
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import okhttp3.OkHttpClient
 import timber.log.Timber
 import java.io.IOException
@@ -121,10 +123,12 @@ class VectorGlideDataFetcher(context: Context,
                         url = data.url,
                         elementToDecrypt = data.elementToDecrypt)
             }
-            result.fold(
-                    { callback.onDataReady(it.inputStream()) },
-                    { callback.onLoadFailed(it as? Exception ?: IOException(it.localizedMessage)) }
-            )
+            withContext(Dispatchers.Main) {
+                result.fold(
+                        { callback.onDataReady(it.inputStream()) },
+                        { callback.onLoadFailed(it as? Exception ?: IOException(it.localizedMessage)) }
+                )
+            }
         }
 //        val url = contentUrlResolver.resolveFullSize(data.url)
 //                ?: return
diff --git a/vector/src/main/java/im/vector/app/features/media/BaseAttachmentProvider.kt b/vector/src/main/java/im/vector/app/features/media/BaseAttachmentProvider.kt
index 103f42e903..d3ab39abef 100644
--- a/vector/src/main/java/im/vector/app/features/media/BaseAttachmentProvider.kt
+++ b/vector/src/main/java/im/vector/app/features/media/BaseAttachmentProvider.kt
@@ -31,8 +31,10 @@ import im.vector.lib.attachmentviewer.AttachmentInfo
 import im.vector.lib.attachmentviewer.AttachmentSourceProvider
 import im.vector.lib.attachmentviewer.ImageLoaderTarget
 import im.vector.lib.attachmentviewer.VideoLoaderTarget
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import org.matrix.android.sdk.api.session.events.model.isVideoMessage
 import org.matrix.android.sdk.api.session.file.FileService
 import org.matrix.android.sdk.api.session.room.timeline.TimelineEvent
@@ -162,10 +164,12 @@ abstract class BaseAttachmentProvider<Type>(
                             elementToDecrypt = data.elementToDecrypt
                     )
                 }
-                result.fold(
-                        { target.onVideoFileReady(info.uid, it) },
-                        { target.onVideoFileLoadFailed(info.uid) }
-                )
+                withContext(Dispatchers.Main) {
+                    result.fold(
+                            { target.onVideoFileReady(info.uid, it) },
+                            { target.onVideoFileLoadFailed(info.uid) }
+                    )
+                }
             }
         }
     }
diff --git a/vector/src/main/java/im/vector/app/features/media/DataAttachmentRoomProvider.kt b/vector/src/main/java/im/vector/app/features/media/DataAttachmentRoomProvider.kt
index d326b8e50a..630433506f 100644
--- a/vector/src/main/java/im/vector/app/features/media/DataAttachmentRoomProvider.kt
+++ b/vector/src/main/java/im/vector/app/features/media/DataAttachmentRoomProvider.kt
@@ -19,8 +19,10 @@ package im.vector.app.features.media
 import im.vector.app.core.date.VectorDateFormatter
 import im.vector.app.core.resources.StringProvider
 import im.vector.lib.attachmentviewer.AttachmentInfo
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import org.matrix.android.sdk.api.session.file.FileService
 import org.matrix.android.sdk.api.session.room.Room
 import org.matrix.android.sdk.api.session.room.timeline.TimelineEvent
@@ -87,7 +89,9 @@ class DataAttachmentRoomProvider(
                         elementToDecrypt = item.elementToDecrypt
                 )
             }
-            callback(result.getOrNull())
+            withContext(Dispatchers.Main) {
+                callback(result.getOrNull())
+            }
         }
     }
 }
diff --git a/vector/src/main/java/im/vector/app/features/media/RoomEventsAttachmentProvider.kt b/vector/src/main/java/im/vector/app/features/media/RoomEventsAttachmentProvider.kt
index fd3386826a..976f13df58 100644
--- a/vector/src/main/java/im/vector/app/features/media/RoomEventsAttachmentProvider.kt
+++ b/vector/src/main/java/im/vector/app/features/media/RoomEventsAttachmentProvider.kt
@@ -19,8 +19,10 @@ package im.vector.app.features.media
 import im.vector.app.core.date.VectorDateFormatter
 import im.vector.app.core.resources.StringProvider
 import im.vector.lib.attachmentviewer.AttachmentInfo
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import org.matrix.android.sdk.api.session.events.model.toModel
 import org.matrix.android.sdk.api.session.file.FileService
 import org.matrix.android.sdk.api.session.room.model.message.MessageContent
@@ -134,7 +136,9 @@ class RoomEventsAttachmentProvider(
                             url = messageContent.getFileUrl(),
                             elementToDecrypt = messageContent.encryptedFileInfo?.toElementToDecrypt())
                 }
-                callback(result.getOrNull())
+                withContext(Dispatchers.Main) {
+                    callback(result.getOrNull())
+                }
             }
         }
     }
diff --git a/vector/src/main/java/im/vector/app/features/media/VideoContentRenderer.kt b/vector/src/main/java/im/vector/app/features/media/VideoContentRenderer.kt
index 59b612afb1..80d2d8ba45 100644
--- a/vector/src/main/java/im/vector/app/features/media/VideoContentRenderer.kt
+++ b/vector/src/main/java/im/vector/app/features/media/VideoContentRenderer.kt
@@ -25,8 +25,10 @@ import im.vector.app.R
 import im.vector.app.core.di.ActiveSessionHolder
 import im.vector.app.core.error.ErrorFormatter
 import im.vector.app.core.files.LocalFilesHelper
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import kotlinx.parcelize.Parcelize
 import org.matrix.android.sdk.internal.crypto.attachments.ElementToDecrypt
 import timber.log.Timber
@@ -83,21 +85,23 @@ class VideoContentRenderer @Inject constructor(private val localFilesHelper: Loc
                                         url = data.url,
                                         elementToDecrypt = data.elementToDecrypt)
                     }
-                    result.fold(
-                            { data ->
-                                thumbnailView.isVisible = false
-                                loadingView.isVisible = false
-                                videoView.isVisible = true
+                    withContext(Dispatchers.Main) {
+                        result.fold(
+                                { data ->
+                                    thumbnailView.isVisible = false
+                                    loadingView.isVisible = false
+                                    videoView.isVisible = true
 
-                                videoView.setVideoPath(data.path)
-                                videoView.start()
-                            },
-                            {
-                                loadingView.isVisible = false
-                                errorView.isVisible = true
-                                errorView.text = errorFormatter.toHumanReadable(it)
-                            }
-                    )
+                                    videoView.setVideoPath(data.path)
+                                    videoView.start()
+                                },
+                                {
+                                    loadingView.isVisible = false
+                                    errorView.isVisible = true
+                                    errorView.text = errorFormatter.toHumanReadable(it)
+                                }
+                        )
+                    }
                 }
             }
         } else {
@@ -124,21 +128,23 @@ class VideoContentRenderer @Inject constructor(private val localFilesHelper: Loc
                                         url = data.url,
                                         elementToDecrypt = null)
                     }
-                    result.fold(
-                            { data ->
-                                thumbnailView.isVisible = false
-                                loadingView.isVisible = false
-                                videoView.isVisible = true
+                    withContext(Dispatchers.Main) {
+                        result.fold(
+                                { data ->
+                                    thumbnailView.isVisible = false
+                                    loadingView.isVisible = false
+                                    videoView.isVisible = true
 
-                                videoView.setVideoPath(data.path)
-                                videoView.start()
-                            },
-                            {
-                                loadingView.isVisible = false
-                                errorView.isVisible = true
-                                errorView.text = errorFormatter.toHumanReadable(it)
-                            }
-                    )
+                                    videoView.setVideoPath(data.path)
+                                    videoView.start()
+                                },
+                                {
+                                    loadingView.isVisible = false
+                                    errorView.isVisible = true
+                                    errorView.text = errorFormatter.toHumanReadable(it)
+                                }
+                        )
+                    }
                 }
             }
         }