It can be a bit slow with larger video files. Often times wonks out or takes for what feels like forever to upload to the servers to be accessed on the app.

I haven't tried on PS5 but on PS4 you could save captures to an external drive, USB too, and get the raw files for that stuff. Worth trying.

You can actually get all of that stuff far more conveniently in the PS App. And not ran through Twitter's compression.