If the video has sound but no picture (or vice versa), you may need to install a codec pack like K-Lite .
This file can be played using universal media players such as VLC Media Player or MPC-HC. Metadata Description (Sample) Girls Forever (1536) mp4
The .mp4 extension indicates a digital multimedia container format most commonly used to store video and audio. It is compatible with almost all modern devices, including smartphones, tablets, and PCs. If the video has sound but no picture