Taking pictures and video on my Canon SD1000, removing the card and putting into the N810. I can view the still photos, but it won't play back the movies I recorded. The movie is listed as this under file manager, removable memory. MVI_0035. When I try to play it, it opens the Media Player and gives me "File format not supported" After I hit okay, its listed as MVI_0035.AVI

I'm totally new to this, and not at all tech savvy. Can somebody please help. Thanks in advance!!!!

(I have a mini SDHC 4gb card)