When you play a video file in Windows 8 it will automatically take you out of the desktop environment and launch the new Video App to playback the video.
If you would prefer your videos to play through Windows Media Player within the desktop environment this can be achieved by altering the default program settings read on to find out how.
Whichever screen you're on, move the mouse down to the very bottom left corner of the screen and right click once and a menu should appear on screen.
From this menu select 'Control Panel'.
From the Control Panel window that appears click on 'Programs'.
On the next screen have a look for 'Default Programs'.
Then from the options listed below click on 'Set your default programs'.
All of the computer's installed programs will be listed in the left hand column.
From this list locate and click once on 'Windows Media Player' to select it.
Two options will then be displayed on the right hand side 'Set this program as default' or 'Choose defaults for this program'.
If you wish to use Windows Media Player to play all supported video and music files, simply click the first option 'Set this program as default' you can then skip to step 5.
However if you wish to use Windows Media Player only for playing videos click 'Choose defaults for this program' and continue to step 4.
The window should now display a long list of different file formats that you can choose to use Windows Media Player for.
To use Windows Media Player for video files you will need to choose the video file formats you want to open with it. You may wish to tick the following common video formats on this list; .avi, .mp4, .m4v, .mov, .wmv & .mpeg
There is no problem selecting other formats from this list just be aware not all formats listed are for video files.
Once you have made your selection click the 'Save' button and you will be returned to the 'Set Default Programs' window.
Click the 'OK' button at the bottom to confirm the changes and close the 'Set Default Programs' window.
Then close the Control Panel window with the red cross.
Go back into the folder where your videos are stored and try to play one again.
This time it should stay in the desktop environment and open Windows Media Player to play the video.