Diatom identifying help

[ImThatOneGuyJoe]

Could use some help identifying what type of diatoms I have and how to go about treating it, thanks! Videos below

 

[vetteguy53081]

Can’t open video on my phone but can you post a couple still pics under white lighting?
Diatoms often triggered by silicates as Dino will have various strains

 

[Champagnebrian]

How old is this tank?

 

[Champagnebrian]

Did you just add a piece of dry rock? On the top left its looks new, hard to tell...