Having acquired a new camera, I note it records movies in the .mov format with a choice of speeds. My other camera uses .avi files and I have no problems but playing .mov files on a PC, from the USB output, results in a very jerky replay regardless of the software used for replay.
The files play OK on the camera and there is an HDMI output so does the manufacturer (Casio) expect this to be used? I haven't tried it yet but I'd rather have files available on the PC. All the PCs I tried are the same, the software includes Quicktime, RealPlayer and GOM Player, anything else just shows a still frame.