I'm trying to compress a video to send it around in a messenger. Normally I would use something like
ffmpeg -i input.mp4 -vcodec libx265 -crf 28 output.mp4
but if I send it around in a messenger app like telegram afterwards, I can only watch it on my PC but not my smartphone (I tested different devices) although the codec is said to be supported: https://developer.android.com/guide/topics/media/media-formats
What is the best way to compress a video for messengers in mobile devices?