This gif is being sped up to at least twice the normal speed. A person is dismantling what looks like a wooden frame in an effort to make an infinity table. The frame has metal hanging brackets that are attached with silver screws. There are staples that appear to be what holds the picture inside the frame. The person is pulling pieces of the frame off with some sort of file type instrument. This is for an led mirror.
Check out the tutorial:
infinity table tutorial