Iv used this extension :
to play video on tracking a picture, but the video wont play, it just shows me the error icon instead of the play icon.
the path for the video is "VuforiaSizzleReel_1.m4v" (without the brackets)
after digging in some similar problems someone refered that the version that I used is creating that problem.
I'm using videoplayback-3-0-10.unitypackage version
and for vuforia : vuforia-unity-android-ios.3-0-9.unitypackage version
P.S : the 3D models works great. but not the video.