how'd you download the video to post it to Nostr?
Discussion
https://github.com/deniscerri/ytdlnis
Works on Android. Works for YouTube, Rumble, Twitter I've verified for sure, and supposedly most other sites with videos. It didn't work on tuckercarlson.com tonight. I had to wait for them to post it on Twitter to rip it.
After you rip a video you'll have a very large bloated video file. You'll want to compress that with handbrake before you upload it to share. Handbrake will reduce the file size by 30-50% on most rips and optimize them for streaming. This app is an Android wrapper for handbrake:
https://play.google.com/store/apps/details?id=me.aravi.compressor