You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
Why don’t you support X? (Spotify, …)
Because on one hand it’s too tedious to keep up with all the changes in external libraries without making the bot too unstable and on the other hand because most services terms are forbidding broadcasting or at least unclear about it. However, there will be an interface you can use to extend the bots sources by yourself. This is already implemented but undocumented.