Maya.mp4 [ Top 10 INSTANT ]
Use the Maya Hardware 2.0 renderer to output a sequence of frames, then compile them into an MP4 using video editing software. Quick Tips for Maya Video Workflow
If your video won't load, it is likely a missing system-level codec rather than a Maya bug. Maya.mp4
If you need to import an MP4 into Maya to use as a background for tracing movements: Use the Maya Hardware 2