This is a cute, low-level reminder of differences between prokaryotes and eukaryotes.

The above video discusses the differences among and relationships between microorganisms and so-called macroorganisms.

The above video provides gorgeous movies of an individual protozoal cell doing its thing.

This is an excellent overview of infectious protozoal.

OK, a little(?) over the top, but it grows on you… pardon.

The above video is a discussion of the concept of coenocytic.