This should be emphasized. I don't want to get too semantic, but shooting and dry firing isn't training, it's practice. Practice is good, but only in that it reinforces what you've learned in training.
Videos aren't training, they're instruction. Instruction is good, but only in that it provides knowledge that can be made practical by guided practice.
The combination of guided practice and instruction is training -- and I really think anyone who is going to bother to buy a pistol and carry it needs to be trained.
I think Gunsite 150 is an adequate baseline. There are lots of equivalents to that particular curriculum -- I think that would be an interesting topic for another thread.
Practice isn't training. Videos aren't training. They're both good things, but if one is thinking seriously about having to shoot to save your life, one needs training.
I need some more training.
Jon
KC