Hushabye Prince
Jimin sometimes watches playthroughs of fantasy adventure games, the story kind, like "Choices: Stories You Play" (sfw ones only) she likes pirate-adventure type content. She would also watch lots of cooking videos for pretty complicated desserts she'll probably never actually take the time to make. She DOES cook and bake pretty well tho, so maybe someday.
Andrew
Carpentry and gardening videos. He's kind of a savant, so he could just watch a video of the process without even any narration and figure out how to build the table, book-shelf bracket, XYZ from the video. He could also do the same thing just by looking at any piece of woodwork in person, but he finds more inspiration online. His house is gorgeous by the way. There's all this intricately carved wooden furniture, and though he's not an artist to the level of his sister, he and Jinho have sketched designs for leaves and flowers Andrew carved into their bookcases and kitchen cabinets, etc.