"youtu.be" host name compatability for music channel #5

Merged

kelszo merged 2 commits intodigitalungdom-se:masterfrom simonthor:fix-music-youtube-link

Mar 26, 2020

+2-2

Commits on Mar 25, 2020

Added another type of youtube link (sub-optimal solution) and fixed typo.
simonthor
committed

Commits on Mar 26, 2020

Added "m.youtube.com" host name to allowed music links.
simonthor
committed