Add youtube URL support in the search bar

[Divide-By-0]

Before

• I have checked for similar issues already
• My issue is not a bad syncronisation between the Spotify track and the YouTube audio (Those go here.)

Description

Currently, you can only search by spotify title name, but would be cool to drop a youtube URL so that i can put in i.e. covers.

Additional Information

N/A

[floriegl]

As far as technically possible this already works. The main issue is that the song is required to be on Spotify because Spotify has the music analysis data required for the EternalBox to work. But if you want to use a different version of the song (which is timed the same as a Spotify version of the song), you can just go to the Spotify song, click on "Tune", insert the YouTube link into the "Audio URL" field and press enter. The instance I am hosting (currently under https://v90084.1blu.de/) allows to directly specify the Spotify and YouTube link on the "Pick a song" page.