Ha. Is that what they're for? I rarely listen to podcasts or video recordings of lectures precisely because I can't do anything else while I'm listening - not if I want to actually hear what's being said.

Alas, I can read much faster than anyone can speak, so listening to someone talk feels like an exercise in tedium compared to just reading a transcript.

The RSA Animate talks work, though - the video adds enough to keep me from getting bored and wandering off.

I can do things at the same time that don't require my attention, like driving on a known route, using an exercise bike, cooking, etc.

I can and will listen to music when I'm doing graphic design.

I prefer silence when I'm doing logical thinking that requires me to use my inner voice, like programming or writing prose. Although I recently found out that it helps when I'm listening to music while writing song lyrics, because it enables me to write from the gut instead of overthinking stuff.

I view it in terms of System 1 / System 2 learning. Podcasts are great for system 2-style learning, where you absorb vocabulary and ideas into your subconscious. Then, when you're ready to sit down and actually learn the stuff, you have a nice scaffold of familiar words and phrases with which you can put together in the correct order.