This is the desmid Xanthidium antilopeum, the most common of Xanthidium. There are many var. of this desmid, this could be var. laeve. Xanthidium antilopeum, cristatum and octocorne I find a lot in samples of De Haeck Zegveld in The Netherlands. And Cyclops, they are allways green, not yellow. Some desmids are very interesting to see in polarized light. Great picture.
Byomic BYO500T microscope /CIOC XDS-1 invert.
Byomic ST-340 stereomicroscope
Olympus BHM Metallurgical Microscope
Canon EOS 7D Mark II / Canon MP-E65
Cognisys StackShot www.ngvm.nl
HAHA, I finally figured out, I had a second window open with Franciscos testate amoeba in it. Not even sure how it happened, unless it was the leftover window from the YouTube link.