I think watching other peoples performances is a fundamental part of learning magic, and the DVD/Video is a wonderful tool for doing just that.
For me one of the big advantages of using a DVD over a book is the fact that you usually do get to see the specific magician performing (incidentally if I had to make a choice I still prefer to own books rather than DVD's, but that's another
topic that has already been discussed.
The
Topic relating to the importance of the performance itself as being one of the (if not the main) ingredient in making a better more entertaining magician, has also been discussed, and in the same vein as that, we have also discussed, the concept of whether
a magician is merely an actor playing the part of a magician.
Incidentally, taking all these discussions together for a second, I'll conclude that David Blaine is indeed a great magician, as that is how he is perceived by the layman. There may be many things to criticise about him, but (imo) you really can't take anything away from his actual magic performances (levitations aside).
Now, to get back to the main discussion point. Which I have conviniently forgot, so excuse me a sec whilst I re-read it again...
Oh yes, well as I already mentioned I think watching the performances is a fundamental way of learning magic and as important as the actual tricks and sleights themselves.
Personally I feel those most likely to fall into the trap fo emulating these heroes of magic too closely are only beginners who have yet to actually find their own style.
However even then, unless the beginner in question had for example only a set of Daryl tapes to learn from - it is likely that they will soon have to develop their own style anyway, otherwise they would end up doing their performance in a total mismatch of styles which would just be awful (not to mention Confusing to the audience).
I think it doesn't take long before we do naturally start developping our own styles, and performing in a way that works for us, and indeed this may be a partial emulation of our favourite performers, but then that will happen subconciously anyway.
I think in the case Midas Kid cited, about learning "ze four jokerz trick" with ze fronch accent, we are presented with a choice. Assuming we like ze trick very much and don't want to exclude it, then we either have to practice it totally with our own patter until we are confdent in performing it in the new way, or we just come up with a patterwise excuse for doing it that way. ie, I was in France the other week, and this waitier showed me a trick...
Anyway - Ive rambled on so much, Ive forgotton any point I was going to make. Sometimes I think I'm just like a goldfish, and only have a 60 second memory.