What device are you using to test it or you are using testing on WakingApp AR Studio?
Please write to firstname.lastname@example.org for further assistance.
You need to import the MP4 to your assets and then:
Let me know if you have any more questions.
At the moment only MP4 video format is supported and to my knowledge alpha channel (transparency video) is not supported in MP4 video format.
For the PNG images with transparency:
This node is used to move an object from one position to another.
Use this node connected to the 'On Update' event.
The node in the nodes list:
Download it from here:
In order to install this node - follow this guide:
FBX format is much preferred than OBJ because it can have embedded textures in it.
Have you tried checking the FBX model in 'FBX Viewer' official tool by Autodesk? If the textures are grey in there, then it might be a problem with exporting the model from your software. Please make sure you have 'Embedded media/texture' toggled on when exporting.
If that doesn't help - you can import the textures as PNGs to the assets folder and then reassign them to the model.
Let me know how it works out for you.