I like to know the name of a non singer girl dancer in a music video. Is Music fans SE a place to ask such question? If not, can you recommend a SE to ask that?
Definitely NOT on Music Fans. If anywhere, then probably Movies & Television.
Although this is a bit on the periphery of what we cover, I would personally consider it a legitimate question for this site. I'm not sure who would be likely to know more about music videos than music fans, and dance and music frequently go together.
Also, as a side note, we need questions far more than Movies & Television does.
I think we can find a lots of bands that have famous frontmen or dancers that stay with the band over years.
A few examples :
Katrin Quinol in the band Black Box (essentially lip syncing for music videos, album cover art).
Jerome Benton in the band Morris Day and the Time (dancing, interactions with Morris on live events)
Bobby Farrell, lead frontman of Boney M.
Lots of 90's Eurodance producers used frontman models or dancers to promote their work.
I understand it would be not in the scope to identify a one-time dancer in the background of a local TV performance. But as I said earlier, some particular cases of a dancer that have a specific role in the band would be allowed.