Webcammaxx.mp4 -

Try opening it with VLC Media Player , which contains built-in codecs for almost all MP4 variants.

If you didn't record this file yourself, do not open it. MP4 files can occasionally be used in "pixel-bleeding" or buffer overflow exploits to execute malicious code. webcammaxx.mp4

If the file size is large but it won't play, it may be an encoding mismatch. Users in technical forums suggest routing output to OBS for more stable recording if WebcamMax continues to produce "broken" reports. Try opening it with VLC Media Player ,