I've cosplayed a few times.
Did Lain back in 2002...... nobody at acen got my solo skit then. I loved it.
Reiji Kageyama was acen and otakon 03...... um..... between both conventions grand total of 37 people knew at all who I was. Acen everyone thought I was Victoria Seras from Hellsing.... despite having entirely the wrong outfit.
Up next is Satoka from Gatekeepers 21..... the 4 and a half foot sword is what sold me on her costume. Oh and she sings as she kills stuff.... enough said.
After that I am going to do Rakka from Haibane Renmei. Trying to get the Halo to actually light up..... first episode version where it is entirely taped to her head and stuff.... so cute. Hoping to have her done by Ohayocon.
Let's see..... then after that I am probably doing a costume that is borderline on being legal. Hahaha I suppose it is okay if I have a flesh colored body suit to cover the naughties..... hee hee.
So um..... yeah..... there are people who make amv's who cosplay..... although they are for the most part, fairly different audiences entirely.

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