PSA, if Newpipe stopped working for you, I was able to get yt-dlp to download videos on Android in Termux.
https://github.com/yt-dlp/yt-dlp/wiki/Installation#android
There's a nice Android build that lets you use the share functionality in Android.
https://github.com/deniscerri/ytdlnis
https://github.com/deniscerri/ytdlnis
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