Allow Override of Live Video Placeholder

[MattyBoombalatty]

Describe the problem to be solved

It would be cool if we could, similarly to adding files to /client-overrides/assets/images/ use this feature to serve a custom/branded banner by default for videos that do not have a user-uploaded thumbnail, generally for lives. This could also apply by default to people who upload audio-only content. If they don't provide a cover photo, PeerTube could use the default banner.

Describe the solution you would like

Allow us to override the default mascot banner for lives using image(s) placed in /client-overrides/.

[Sakrecoer]

I would very much like to see this applied for default-audio-background.jpg as well. (Which right now is a grey rectangle)

[Chocobozzz]

As a workaround, after the first installation and each update you can replace the file in .../peertube-latest/dist/core/assets/ directory

[MattyBoombalatty]

As a workaround, after the first installation and each update you can replace the file in .../peertube-latest/dist/core/assets/ directory

This works really well as a workaround. Just tested both. Thanks!