feat(Youtube): Play vertical/Short livestreams on default player

[Oleepre]

Feature description

Opening a vertical livestream that is tagged as a short will make it play using the Shorts UI/Player.
This happens when clicking on the video on your feed or by opening a youtube link to it written as https://www.youtube.com/live/abcDEFGhi1j
However, if we change the link to use the classic format https://www.youtube.com/watch?v=abcDEFGhi1j instead and we opened it like that, the stream uses the classic youtube player, with chat on the botton, description, Quality settings, etc.
Using the classic player the stream can use Background Playback (PIP or just audio) which we can't do if it uses the Shorts player.

Steps to reproduce:
First we need an active stream.

• Make sure you're not hiding shorts shelves.
• Search the term #shorts
• Click Search filters, and in Features click "Live".
• Click on a video, make sure it's a livestream and that it's using the shorts UI.
• Click Share and copy the link.

Now go to an app where you can type and edit text. I use a notes app but writing in on any text field like a messaging app works too.
Paste the link, replace the /live/ part of the link with /watch?v=
Either click on the link or select the whole link and click Open in Revanced.
The stream will play with the default player.

Motivation

We can see that youtube CAN play these videos with the classic player, so it would be nice to have an option to do so while clicking on one in the app or handling /live/ links.
We get to use settings like background playback, quality setting, swipe settings and others. We avoid jumping through shorts by accidentally swiping, default quality not appying properly all the time, and such.

Acknowledgements

• This issue is not a duplicate of an existing feature request.
• I have chosen an appropriate title.
• All requested information has been provided properly.

[LisoUseInAIKyrios]

#1800