Advise on Creating a Custom Page
Using Jamroom
You'll want to use something other than audio and video as those URL's are assigned to the modules as the default URL.
Have you tried www.site/music/categoryname_1 and www.site/music_video/categoryname_1 instead?
The above would require you to create a music.tpl and music_video.tp but this would keep it from conflicting with the audio and video default URL's.
Hope this helps!