Hi, I am not aware about solution given here, not working for me also.
But it is possible by adding video texture in the modeling software (3D max, Cinema, Blender etc.) before export to TM. If Your modeling software can do video texture, then just add video texture there - - - > export with textures embeded to .fbx file and it will play automatically after import to TM.
Only downside is that video is playing faster in TM - so you should slow it down to something between 10 to 20% of original speed before texture/export procedure.
A have made a short clip about it, that it is possible...see here:https://www.youtube.com/watch?v=PKxvrwA1VKM
Hope it hepls