add info_json fn

zsh/youtube-dl.zsh

@@ -16,3 +16,9 @@ alias downloadYT="yt-dlp --write-thumbnail \
 function downloadList() {
     cat $1 |xargs -I _ yt-dlp --downloader aria2c _
 }
+
+# info_json VIDEO_FILE
+# View info.json from video file
+function info_json() {
+    mkvextract -q attachments "$1" "1:/proc/self/fd/1"|jq .
+}