Help with my Bay Consumer Ivo-sound m260?

so, i just bought this mp3 player yesterday and the video feature on it is only compatible with "avi" or "mtv" formats. I tried converting wma/wmv videos into avi but then when i put it on my mp3, it says that the size is too big. So can anyone tell me a site where you can download avi or mtv formatted music videos that are free? THANNXXX