Can someone help me ID Dinos Sample?

[liamelias]

I have been battling what I suspect is Dinos since it has wiped out my coral and my nutrients are 0. The following videos were taken of an algae sample with a cheap toy microscope. Apologies in advanced

 

[Lavey29]

https://www.reef2reef.com/attachments/dinoflagellateid12_12_2019-pdf.1324729/