If your video won't load, it is likely a missing system-level codec rather than a Maya bug.
Many professionals playblast to a high-quality .avi or .webm format and then use Clipchamp or Handbrake to convert it to a standard H.264 MP4 for sharing. Maya.mp4
A "Playblast" is a way to preview your animation without a full render. If your video won't load, it is likely
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
MP4 files use temporal compression, which makes "scrubbing" (dragging) through the timeline laggy or inaccurate as Maya tries to calculate compressed frames.
In Maya, create an and check the box for Use Image Sequence .