Any idea what this is?

[Free2Fish]

I assume this is a ciliate of some sort but am at odds with getting any closer than that.

https://www.youtube.com/watch?v=O20RWamwnes

[apochronaut]

I suspect a blastocyst of some kind. I do see what looks like the movement of cilia. A contracted rotifer? They don't like to be squished.

[Free2Fish]

I watched this specimen as long as my patience allowed and saw no movement other than the hint of moving cilia. I suppose a large squashed rotifer could look like that.
Or perhaps it’s just another unidentified microscopic object. I seem to have no trouble finding those.
Harry