Implement a way to show stuff on a "screen" in a scene

[Myrmod]

I have seen several use cases where someone wanted to show something on a screen inside of a 3D scene.

• [ ] website
• [x] image
• [x] video
• [x] text

This way you could start to create something like an art gallery. So far I don't know how to do this, but I know it's possible.