Hi Noah. The “old ANTS” videos were recorded in 2015, and were my first feeble attempts to do home recordings. The content is OK but the A/V quality is shamefully terrible.
Over two years I completely re-did all of my lectures, including all new slides, updated code, and much better recording equipment. I left the old videos up there in case people have links to them, but I don’t actually recommend the old ones over the new ones.
The content is basically the same, but the delivery is, of course, a bit different. Better, I would say, because I had another 3-4 years of teaching to further improve the approach.
As for the Udemy course, that one is even longer and has a lot more material in it, including a ton of MTALAB exercises, code challenges, and demonstrations. Basically, the theoretical lecture material is all on youtube, and that plus all the hands-on work is on Udemy. That said, I tried to make everything available on youtube to be a complete learning experience.