Your CPU won't be fast enough without hardware acceleration. I'm not even sure if it's fast enough with hardware acceleration enabled.
Hardware acceleration on the 6200 probably only supports the MPEG2 video codec. The acceleration feature must also be enabled.
DivX is not MPEG2. The video is in the AVI format which the graphics card can not decode, your CPU must do this.
Your CPU is not powerful enough to decode High-Def video.