Outstanding. Clearly presented, so much so that even with high school calculus, some background reading, and a dash of self-taught partial derivatives I could follow what was going on. I've been interested in this stuff for years, but my chosen career took me in other directions and it became an intermittent hobby which I resurrect from time to time. The more of this stuff there is, the better.
Great. Fluids can be extremely frustrating at times but also very elegant once you work it all out. I'm planning to add more videos on fluids (particularly boundary theory and the Navier Stokes Equations over the Christmas period).