Hairy montipora normal or algae?

Those are mesentary (not sure on spelling) filaments. Typically a coral displays these when being aggressive, feeding, or stressed. I would watch it for a few days. It may just be settling in.
 
How close is that hammer to the monti, any damage to the monti?
I know they look really close together in that video, but there is a lot of space between them. They never touched.

The monti is new so I think it was adjusting. It stopped.
 
Are you sure that is a monti? Can't really tell from the video, but I dont think it is. Could it be a leptoseris?
 
Not sure if that is a monti either, maybe a porites coral. Any sign of polyps?
 

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