Honestly, this isn't exactly your problem, but Dolphin simply isn't setup for 4K gaming; and honestly I don't know if there will be much point. The good news is that there definitely are plans to have custom IRs (so you can set the internal resolution to whatever you want) in the future, so for the people who really want 4K internal resolutions, they'll have it.
I more or less think you jumped the gun a bit on this; and 2x IR isn't even 1080p; so the videos suffer as such.
I more or less think you jumped the gun a bit on this; and 2x IR isn't even 1080p; so the videos suffer as such.