If you want to record Disney Plus with OBS, Firefox can certainly help you solve the problem of recording black screens. But if you want to keep your videos for a long time and want to have Disney Plus videos stored on any device, your best bet is to use
MovPilot Disney Plus Video Downloader. With this software, it's like having a cornucopia. Not only are you free from energy and time consumption when recording, but you can also have the ultimate audio-visual experience of the original video.