Video-Tutorials vs. In-Person-Classes. Does it matter ?
No. It doesn’t.
You can learn just as much from a video as you can from being there. The difference ? The kinesthetic information is missing. Truthfully ? You’re going to miss that anyway because the class is blind-leading-following-the-blind.

Practice (part 1)
For most people the idea of practice is about practicing the dancing part. Not about the actual "practicing" part. Practice really wants to take apart what one does, how one does it, while asking for feedback & input. Then asking questions, and then figuring out where things aren’t working and why, to smooth out the rough edges of something, and then continually refine, and refine, and refine it so that it becomes effortless.