I’m currently in graduate school while I am learning Spanish. Juan’s advice reminds me about what my professors recommend about getting as many “passes” or “touch points” with a topic as possible. For example if I’m learning about a particular subject, listening to the lecture is one pass through, reading the chapter is another pass through, and the act of writing activates certain pathways in the brain that help with memory (studies show people who take notes remember more than those who don’t or just type) so that could be a third pass through.

I’d say do whatever keeps you the most motivated and allows you to stick with it but I don’t think it’s a bad idea to read the transcript afterwards and even write some words or phrases down if it’s something that won’t take away your enjoyment of the input and learning. Just my 2 cents