I’ve tried uploading several big-size videos and it worked perfectly for me. The speed was fast and haven’t had any problems yet. Nice concept! But the main issue is that I usually download playlists full of music and it’s not quite comfy to listen to them in a video format. I tried to find the solutions on the internet but had no success. But I was lucky to meet one of my ex-colleagues who shared with me a link to https://coconvert.com/youtube-playlist-downloader.html where you can make such manipulations. You know, I think it’s going to be great if you implemented this feature in your app.