Doing all those things at once is one thing. My question is: how well they understand (and enjoy) the audiobook, how much they remember from the podcast/youtube

Doing all those things at once is one thing. My question is: how well they understand (and enjoy) the audiobook, how much they remember from the podcast/youtube video, or think before sending a message to their friends? or how is their performance on the game while doing that vs if they are focusing? My wife multitasks like this all the time (tv + phone), but then she has to ask me something about what's on the TV because she missed it or didn't understand well