At least for the Elgato Camlink 4k USB I didn’t have to do anything special, I just hooked it up and it started showing up in the Unreal Media Player.
See this example Playing Live Video Captures | Unreal Engine Documentation
At least for the Elgato Camlink 4k USB I didn’t have to do anything special, I just hooked it up and it started showing up in the Unreal Media Player.
See this example Playing Live Video Captures | Unreal Engine Documentation