I don't have a video, just learned by doing. When I'm pruning my hibiscus, I've taken the cuttings, removed most of the leaves accept at the top. Put some cinnamon on the cut part and stick in soil. Some will take, some won't, so for success just stick more than you want. I've had success starting hibiscus this way. I live in Florida so this may be why I've had so much success with it.
I do use YouTube for plant videos, but trial and error seems to work better for me. This is one that it now producing buds.
The cutting was about 6-8 inches long.