yt-dlp is not even necessary. If just downloading videos from YouTube this can be done with much less code and complexity. I use a tiny C program to do it. Tiny shell scripts work just as well.
What no one is discussing is that yt-dlp can no longer download itag 22 and itag 18 is now throttled.^1 This means yt-dlp has to download an audio file and a video file and use ffmpeg to merge the two.
YouTube ad revenue just missed consensus estimates. Perhaps the accessibility of videos on YouTube is going to get even worse.
1. One will not likely notice this unless one is in the habit of specifically choosing format. For example, some folks have used itag 18 and 22 exclusively for many years.
I also realised the same thing yesterday. I tried using a specific tag quality, for a playlist and many of the videos failed to download. So, I just set it to download the best available quality for video and audio.
I have a simple webapp here that utilizes WebXR API. I have also added some controls using gestures. Please try it out and do let me know...