: The most reliable free tool for opening almost any video format.
However, if you are looking for a guide on how to this specific file type, here is what you need to know: 1. Why does it have two extensions (.mp4 and .mkv)? VID_20221216_110750_187.mp4.mkv
: Sometimes, simply deleting the .mkv part of the name works if the file was originally an MP4, but this is less likely to work than using a converter. 4. Safety Warning : The most reliable free tool for opening