Dinos or Diatoms or something else？with pics

[Kevinreefbuddy]

Hello, everybody

Can somebody helps me ID this please ?
The pictures and videos are under 400X microscope .

They grow a brown film on the glass and move super fast under microscope when they were “fresh”.

Thanks a lot!

 

[Lavey29]

Here is a dino ID link

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