In this trick u will learn how to hide any file or video inside a photo
1. Open "cmd"
Make a new folder in desktop name it as 1
in that folder move any pic [suppose 2.jpg] and a video/any file [suppose 3.mp4]
2. Now on cmd type cd desktop/1/ and hit enter
3. Now type copy /b 2.jpg+3.mp4 Result.jpg press enter
that's it... U will see a file name Result.jpg and if u double click on it, it will be view'd as a photo... even if u try to edit it will be treated as a photo.. But the size will be same as of the video or of the file u used.
And if u try to open it with WIN-RAR it will again show the photo.
The only way is by changing the extension to .rar