I'd suggest looking at the map sources to see how it's set up. There is a ton of stuff set up around it for effects, but the actual movie playing part is actually really simple. Basically, it uses a info_offscreen_movie_texture entity to feed the movie to the material on the monitor prop.

Setting the entity up the same way as in the map should allow you to play any movie on the same monitor prop if it has the moviePlaying skin set. If you want to play it on a custom prop or material, you have to add a dynamic material expression to the color texture to make it use the movie instead.

Originally posted by Rectus:

I'd suggest looking at the map sources to see how it's set up. There is a ton of stuff set up around it for effects, but the actual movie playing part is actually really simple. Basically, it uses a info_offscreen_movie_texture entity to feed the movie to the material on the monitor prop.

Setting the entity up the same way as in the map should allow you to play any movie on the same monitor prop if it has the moviePlaying skin set. If you want to play it on a custom prop or material, you have to add a dynamic material expression to the color texture to make it use the movie instead.

what do you put in the box for dynamic expression?

See this article:
https://developer.valvesoftware.com/wiki/Dota_2_Workshop_Tools/Materials/Dynamic_Material_Expressions

In this case the entire material expression is just the same string name you set as the Target Render Attribute in the info_offscreen_movie_texture, and you apply it directly to the color texture property instead of any of the parameters below it.