Does DISCO support video as well as audio?

Yes! DISCO supports video as well as audio, both inside DISCO: 

And on the public Playlist pages you send out: 

 You can upload videos like you upload any other file to DISCO––by dragging and dropping them into the Playlist Creator column at the right of the app. 

Note: We do not currently support videos encoded in H.265 (also known as HEVC).