H.265 video support

### Your use case

#### What would you like to do?
Add support for H.265 video support.

#### Why would you like to do it?
It's a popular video compression codec/format.

#### How would you like to achieve it?
See what the team thinks and go from there.

### Have you considered any alternatives?

I just use handbrake to reformat into h.264, but h.264 is kind of on it's way out.

### Additional context
I can help test it if need be.

### Are you willing to provide a PR?

Yes

The issue names no files, tests, or entry points. First clarify whether H.265 support means playback, upload, or both, then identify the Android media-handling entry points and relevant tests; done means the agreed H.265 use case works and existing video behavior remains intact.

Written by the indexing model from the issue text.