diff --git a/src/library/mod.rs b/src/library/mod.rs
index cd9a7da..41d3a61 100644
--- a/src/library/mod.rs
+++ b/src/library/mod.rs
@@ -159,6 +159,13 @@ impl Library {
             .unwrap()
     }
 
+    pub async fn get_all_videos(&self) -> Vec<Video> {
+        sqlx::query_as("SELECT * FROM videos")
+            .fetch_all(&self.conn)
+            .await
+            .unwrap()
+    }
+
     pub async fn get_newly_added(&self, n: i64) -> Vec<Video> {
         sqlx::query_as("SELECT * FROM videos ORDER BY date_added DESC LIMIT $1;")
             .bind(n)
diff --git a/src/main.rs b/src/main.rs
index a717da1..ee2bb80 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -35,6 +35,12 @@ async fn launch() -> _ {
         library
             .scan_dir(&Path::new(&dir_path.clone()).to_path_buf())
             .await;
+
+        // Ensure thumbnails
+        for video in library.get_all_videos().await {
+            log::info!("Ensure thumbnail for {} [{}]", video.title, video.id);
+            library.get_thumbnail(&video).await;
+        }
     });
 
     let cors = rocket_cors::CorsOptions {