Yep — YouTube ain't just for funny cat videos or 1960s Bert Kaempfert songs! I go there all the time for DIY / repair help.
Type in what you're looking for and nine times out of ten, someone has posted a video about it — of varying helpfulness.
The "settings" (gear) icon is indispensable. Some of the people putting up these videos talk too [bleep!]ing slow. Push "Playback speed" up to 2X and you'll save time when you get stuck with one of...them...slow...talkers.
And that time when I was trying to learn how to properly change a tire on a bike, and the guy showing me was way, way too fast, well, you just know I slowed it down to 0.5 — and then all the little bike tube-changing nuances were that much clearer to my slow, slow brain.
Why, just last night, I learned some how to correctly use the hot glue gun holder that came with my hot glue gun (infuriatingly, without directions) — thanks to some nice lady on YouTube.
Then, pleased with what I had accomplished, I rewarded myself by listening to "A Swingin' Safari."