I don't know anything about crochet videos, but the best way to make your stitches tighter is just to use a smaller needle. You could also try wrapping your yarn on your hand differently to create more tension, but you have to be consistent.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry