So (as you may have noticed) I finally got to put a playlist on, and I can easily add/remove songs... as long as they are on deezer. So don't hope for obscure youtube videos, I won't be able to add them.
Also, it resets every time you change pages, and I don't know how to put it on shuffle by default.
The playlist widget is under the latest topics one, right above the mos viewed topic widget.
I'll try to get one that doesn't reset every time, dunno if I can though :<
Welp, at least we have something I guess now haha I already put three songs :]