So far I have been enjoying the video a lot. From the history of the cube and Erno Rubiks, to the math, to a speedsolve, to a (succesful) blindfolded solve, to a great explanation of cycles and then something I had never heard of "the banquet of Simonedes" for memory. Just 2 remarks I have: Guus isn't the WR-holder for FMC with 22 moves, that would have been István. Guus once held the WR with 27 though. And for the explanation of cycles I would have started with a simple 2-swap system and THEN expand that to fit the laws of the cube (3cycles and double swaps), but skipping that step might not have been a problem with this target audience
I really hope you can get the sound back so I can watch more. I am going to pass this on to some others that will enjoy watching this.