Agreed, both the clowns in that video are clarki clowns, just different color forms.
The clown in the OP is also a clarki clown. Sebae used to be the common name for clarkis in the aquarium trade for some reason, and it is still being used by some wholesalers and LFSs. It tends to create a lot of confusion especially since many wholesalers and collectors can't seem to tell the difference.