do these step by step , hope it work for u
Im using unreal engine 5.4 now
S1 : go to Edit > plugin > And Enable “Apple ProRes Media”
S2: ReStart PC or Mac
S3: Create MediaPlayer
S4:LeftTopCorner You W’ll see the Folder > click on that > In Video Select Your Webcam Type
S5: if it Not worked Do it Then => on PlayBack Option Section > hover the Video and Select Another
Streaming Channel
+Note that To make sure your Streaming Media Source Are Anabled On PlaList
Finally 
