How can I learn from songs/videos

Hi everyone. I'm learning MSA at university and my lecturer (who's a native speaker) makes us watch children's videos and nursery rhymes on YouTube. I really enjoy these videos/songs as they are super helpful (he makes us watch stories of Juha and his donkey — not really a fan of those — and songs from OsratounaTV) but I'm not sure how to study from them. Like I'm learning new words but they're kinda useless if I don't know how to spell.