Any video you captured through Sony XDCAM, Panasonic DVCPRO P2 and canon XF is of .mxf video file format. It is used by good camcorders like Panasonic P2 502, HVX200, Sony XDCAM and Canon XF300/XF305 to store audio, video and programmed data. There is a format called, MXF file is the container format (like AVI) for the swap over of program material between tap streamers, servers and to digital archives mostly and usually used in the chain of media production, distribution, editing and storage.