Help ID algae and worm

[Rueric]

Hello!
Can someone help me id what type of algae and worm is in my tank?

the first one is a picture of the algae, currently just a single strand, long and a bit hard. I’ve pulled out maybe 5-6 strands from across my tank in the past week. I’m afraid this is going to go full scale if I don’t treat.

second one is a video of the worm, very hard to see. Super tiny and only about 2 from what I’ve seen so far. Is this going to eat me when it grows up? It doesn’t look like a Bristle worm.. the body is striped a bit black. When they were smaller, they were all white

 

[Yates273]

How old is your tank? Hard to tell with algae. Does it have bubbles on the end and what color is it?
Best bet of identifying is through a microscope to be positive.
Worm no clue could be a baby bristleworm

 

[Rueric]

Color of the algae is like a greenish/brown string. Doesn’t seem soft like hair algae. Really hoping it’s not Bryopsis.

 

[Mark_C]

I would call the algae Reginald.
The worm definitely looks like a Sam.