Differential Topology with Prof. John W. Milnor (1965) [video]
math.stonybrook.edu
math.stonybrook.edu
Also, the way Prof. Milnor started off his class ("In order to start talking about differential topology, I have to first give a few definitions…") really made me chuckle. As a former math student who had to sit through many painful and sloppy math lectures I very much appreciate this no-nonsense (albeit maybe a bit dry & stereotypical) approach to math.
If you are not quite ready for it, or need some inspiration first, I recommend "Intuitive Topology" by Prasolov (https://bookstore.ams.org/mawrld-4/). It is short, has no prerequisites, and communicates the flavor of some of these ideas. (It also covers some knot theory, which is a different subject)
[0]: Same Spivak who wrote the famous Calculus book and a series on differential geometry.