I wish they would stick to English

how do I upload video in the app?

please see FFshare app as an example.

https://f-droid.org/packages/com.caydey.ffshare/

content language deselection takes too long.

The app should load an instance like FramaTube by default which seems to have a sensible selection of federated instances. This would allow new users to see what’s on offer without burdening them with information about instances and federation.