Show the current match schedule or some videos, when there is no match running currently

[g3force]

The screen of the status-board is running all day, but most of the time, there is no match.

It would be nice to use it to show the match schedule, or show some videos for spectators.

Maybe also during longer pauses during a match to entertain the audience?

[g3force]

There is now the possibility to show a video or any other link.
This still needs to be documented.
The major drawback of the current solution is, that the video is running in the background all the time, consuming bandwidth.
This could be solved by using the Youtube API and pausing the video, when not in foreground.

[g3force]

Another improvement: Use stage timer to decide if video should be shown. Currently, the command timestamp is used, but during breaks, the video could be shown immediately and hidden, when the break stage is due.