If it is just a naming error, you can rename the file by removing .mkv from the end, leaving only .mp4 . 2. How to Convert/Fix the File
If simply renaming doesn't work, the file structure might be damaged. Download and open Handbrake . Drag and drop your file into Handbrake. Select a preset (e.g., "Fast 1080p30"). Set the format to MP4 . make up artist.mkv.mp4
If you need to change the file to a standard .mp4 for use on a TV, phone, or video editor: Right-click the file and select Rename . Delete .mkv so the file ends only in .mp4 . Confirm the file extension change if asked. If it is just a naming error, you
(e.g., Windows PC, Mac, iPhone, Android, TV) Download and open Handbrake
Verify that the file size is large (e.g., hundreds of MBs or GBs) and not just a few KBs.