This video series is interesting, 

Here are some links to various online resources for learning mathematics which I used. 

• AIM Online Research Community on Link Homology (I believe all are welcome to participate, just fill out the "on-line form"). 

• Seminar on Modular and Geometric Rep Theory (IAS Fall 2020)

• Sydney's Informal Friday Seminar

• Quantum Symmetry Lectures

• Sydney Mathematical Research Institute Youtube Channel

(Notes for Geordie's course on the youtube channel can be found here.)

• Geometric Rep Theory at Home

• Virtual Rep Theory Seminar

• Categorification at Home

• Rank 2 Cell Pictures on Lusztig's page

• Affine A_3 Cell Pictures by Paul Gunnells

• Recent Papers on Arxiv in Representation Theory

• MIT Lie groups seminar

• MIT infinite dimensional algebra seminar

• MSRI summer school on Soergel bimodules

(There is a book based off these lectures. I coauthored a section on "Lefschetz Linear Algebra".)

• MSRI summer school on planar algebras

• W.A.R.T.H.O.G. summer school

(Ben Elias and Nick Proudfoot's summer school. I attended in graduate school.)

• Notes from the Dacha seminar 

(Juteau, Mautner, Riche, and Williamson explain some results in modular geometric representation theory.)

• Videos from the QUACKS conference. Includes an excellent minicourse by You Qi on categorification at a root of unity. 

• GKM and Equivariant Schubert Calculus

• On a drawing in Dixmier's Enveloping Algebras.

• LIE Online