What are these tiny, white crawling bugs?

[gareefer1029]

There are thousands of these little white "bugs" crawling all over my live rock. Are these some form of copepods? Are these good or bad? (See attached video)

 

[Hydrored]

Can’t see the video but more than likely copepods from your description, copepods are a good thing to see

 

[Gtinnel]

Looks like amphipods to me, and yes they are a good thing