Not sure i understand the question, but if you want to send the Aximmetry video to the slot you’ve circled, you just need to set the Element Index to 4 in the Set Material blueprint node. 

I changed the index to 4, the video does not play

Make sure the TextureParameter2D Name matches the Parameter name in the blueprint exactly. Are you using the correct Parent for the material instance? This is how it’s done, so if it’s not working for you it’s because you’ve overlooked something.

Thanks, figured it out! Now another question. I applied a material to the floor and made a Blueprint for the color, but now I can’t create a scalar "Albedo Controls". I need Contrast and Brightness 

Maybe you could start with telling us what the issue was? That’s for the benefit of anyone else with the same problem who might be searching to forum for a solution. 

Regarding setting the Albedo controls, my guess is that those are part of a Material Function, so the Vector (or Scalar) parameter values won’t be directly accessible in the Level Blueprint. This is just a guess, but it does make sense. 

Is the Albedo Tint control working as expected?

I made a circuit for the Albedo Tint parameter and it is perfectly regulated, but it doesn’t work for the Albedo Controls parameter 

TInt control works great! Are there any options on how to add a scalar parameter to Albedo controls?

The one I mentioned?

Yes, I made Albedo Tint without any problems! I made Albedo Control too!