How do you edit "Media Type"???

[cyclocross]

So several of my movies are showing up in the Other Media library instead of in the Videos library. When I right click->Properties->File on them it says "Media type: Other". Question is how do I change this to read "Videos" so they'll appear in my Videos library?? Tried using Mp3tag and manually editing the MEDIATYPE field in Extended Tags but that didn't work.

 

[Zidane24]

It may be labeling and sorting them by extension (a hunch here...)

Are all the videos the same extension (such as .mp4)?

 

[bffsreunited]

I have a similar problem. When I click on a video file on my desktop it just has the audio but when I click on the same video on OneDrive I have the video and the audio. When I look at the media type it says others. How do I change it so it says Videos? Please reply before 11th July because I am making a presentation for a friend.