Are there any moves (be they submissions, escapes, ways to hold a position, etc.) that you have only seen demonstrated on a particular instructionals DVD/Vid(s) that you've never seen in any book on BJJ/Submission Wrestling?
I ask this because books, generally speaking, contain more moves in them than DVD/Vid(s) can and are easier to carry around, and even to purchase, for obvious reasons, but at the same time I don't wanna miss out on certain techniques, or variations on them, that may only be available on a particular instructional, so I'd like to know if there are any, which ones they are, and where they can be found.
Again, I am not looking to replace my instructor through use of instructional books, DVDs, or Videos, just to supplement the instruction, use them to review, or to get a different take on things when I can't roll or have some free time.
Your responses (serious and intelligent) are appreciated.