My problems with video materials are many.
1. I apply a video material to a quad and the alpha shows as black in both Designer and Sequencer. Is it actually alpha? Can't tell. If I group it with a Layer Object to try to force the transparency display, I can't see anything.
2. Same quad, I can't figure out a way to scrub. Hunted on the forums and manual to no avail. Tried adding to an Animation Controller with a dummy keyframe but no good. I know you can add the material to the Scene Director directly with Autorun set to Off and that'll work, but then I'm back unable to see transparency again.
3. Like in 2, a Video Material added directly to the Scene Director timeline shows no alpha, just black, but I can at least scrub playback. And I'm not sure how to place something behind it to see if it's transparent or not.
4. Materials (video and still) in the Materials Editor don't show anything in the RGB and Alpha chips. Both just have a gray "(none)" in the little window. Videos have gone through Incoder. Stills can be any file type, with alpha or without.
Figure I must be doing something wrong at a fundamental level. Feel like this worked in training but a lot's happened since then.