diff --git a/get_peertube_videos/get_peertube_videos.py b/get_peertube_videos/get_peertube_videos.py
index aca2ab9..84dcbb9 100644
--- a/get_peertube_videos/get_peertube_videos.py
+++ b/get_peertube_videos/get_peertube_videos.py
@@ -185,7 +185,8 @@ class GetPeertubeVideos:
                     '-map', '1',
                     '-map', '0',
                     '-c', 'copy',
-                    '-disposition:0', 'attached_pic', f"{video_file}_with_thumb.{file_extension}"
+                    '-c:v:1', 'png'
+                    '-disposition:v:1', 'attached_pic', f"{video_file}_with_thumb.{file_extension}"
                 ],
                 capture_output=True,
                 check=False