I've looked everywhere, but I have had no answer so far.I want to render my video so that when it's uploaded to a website (let's say youtube), there's an option to view it in beautiful, crisp, 4k quality. I made a video before of a model test, I added normals to the model, rendered it, uploaded it, and realized it was in 4k.
Just set the render resolution accordingly...using DCI 4K:
Make sure to have the "percent" at 100%.
Let me know if I misunderstood your question.