The video is dark so it is difficult to see even with the flashlight on, however, it looks like a you have dust, dirt, and a lot of mold up there from what my husband and I can see.

If it looks like the pics in the link below, it is mold.

Here is a link that might be useful: mold in attic

Dust in old spider webbing. Pretty normal.

Mold does not hang down like that. It forms on flat surfaces and looks more like discoloration.

X 2 what handymac said.

really hard to see, but mold usually forms in
round growths.

all houses have mold. very few of the hundreds
of types of mold are toxic.
looking at pics doesn't determine type of mold,
or even if it is mold. it has to be tested to determine
if its mold..and if its toxic mold.

btw...y'all just hanging out in the attic listening to music?

LOL!

best of luck.