There are a couple of reasons why you may not be seeing the video:
1.The video file format you are using or the compressions (CODECS) is not supported by Blink 3D. Blink 3D supports a wide range of file formats and CODECS so this is unlikely to be the case. Try playing the video using Windows Media Player. If it works there it should worl in Blink 3D.
2. Verify using something like Windows media Player that the URL you are using for the video is valid and that the vidieo is being streamed at a reasonable rate and that playback is smooth. If you are seeing the video degrade in Windows media Player it will probabaly be worse in an environment.
3. Make sure the Vidoe Material Width and Height properties are set correctly for the aspect ratio used when the movie was created. If in doubt set the width and height to 512x256 or 512x256.