I looked up pictures of spaghetti worm. Looks like that's what it is!I see threads from a spaghetti worm moving around. I don't see an aiptasia in the video. That doesn't mean there isn't one there.
A stalk with a disk on the end with arms radiating from it. They always look like this.
Turn on your sink hat water asn let it get as hot as it can and them turn is down to a trickle and let it hit the spot to 30 seconds. Scrub it with a toothbrush and repeat once.