I was trying to get through the Quant Mountain but had trouble concentrating on it consistently. I’d spend ten minutes stuck on one concept, then gloss over another without really covering it. So I recorded the whole thing and now listen to it every day. It takes a lot less effort to absorb.
It takes roughly 96 minutes at normal speed, 43 minutes at double speed. But you can listen while doing anything else: driving, walking, doing chores, etc.
Hope it helps you as much as it’s helped me!