I took physics in high school but only crammed before the exams. Didn't really learn anything for the long-term.

Now I'm doing theoretical CS in college, and while none of this is really necessary I'm wishing I had actually committed to memory shit about electrons voltage transistors circuits etc. just to get a better feeling for fundamentals. What's the best high-level refresher out there? I plan on reviewing chapters per Serway's book, but also wanted to ask here. Any good videos/series up online?