Add a button "Send to Chromecast via VLC" to send a video to VLC at a specific resolution and start chromecast (via VLC)

[sebma]

Checklist

• I checked, but didn't find any duplicates (open OR closed) of this issue in the repo.
• I have read the contribution guidelines given at https://github.com/TeamNewPipe/NewPipe/blob/HEAD/.github/CONTRIBUTING.md.
• This issue contains only one feature request. I will open one issue for every feature I want to request.

What feature do you want?

As a chromecast support workaround :

I'd love to be able to send a video to VLC at a specific resolution without having to switch from the "internal video player" to "Use external video player" (in the NewPipe "Video and audio" Settings) each time I want to be able to "chromecast" a youtube video via VLC.
The Share button could be a solution, but does not let use choose the resolution before sending the video.

Why do you want this feature?

Two reasons :

• The share button sends the original URL to VLC and VLC opens it at the maximum resolution and then the video playback gets jerky because the resolution is too high
• Switching from the "internal video player" to "Use external video player" (in the NewPipe "Video and audio" Settings) every time can be a little tiring over time

Why not propose a button asking (when clicked) for the video resolution and append the chosen resolution to the URL accordingly before sending it to VLC, examples :
https://www.youtube.com/watch?v=mUa8HeRxaV4&fmt=17 (for 176x144)
https://www.youtube.com/watch?v=mUa8HeRxaV4&fmt=18 (for 640x360)
https://www.youtube.com/watch?v=5TouMs3QGBg&fmt=22 (for 1280x720)

And the cream of the cream : start the VLC chromecast feature automatically 😄

[sebma]

Related : #668