There's an amazing and very large list of Open University courses by T. K. Finchley here https://tkfinchley.com/ou-maths-courses/. I particular recommend their course OU M335/M386/M435 Metric and Topological Spaces and Geometric Topology. Just wonderful pedagogy
via u/dnrlk at https://www.reddit.com/r/math/comments/1shlljv/20th_century_math_explainers/