UE 4.13 Media player plays texture too bright (with emissive color)

Here is the info tab of the mediaplayer :

Player: WmfMedia

Forward Rates
Thinned: Not supported
Unthinned: Not supported

Reverse Rates
Thinned: Not supported
Unthinned: Not supported

Capabilities
Scrubbing: Yes
Seeking: No

Stream 0
Type: Video
Codec: MP4V
Protected: No
Dimensions: 720 x 408
Frame Rate: 24 fps