I don’t remember seeing a camera in the YouTube app. Are you saying you could open the YouTube app and then press a camera icon and film and the video would automatically be in YouTube? The only way I know of to do that would be with the GoLive thing and I’ve never been able to do that(I am certainly not an Android expert though). The app itself has changed though because now there is a “Shorts” button. “Go Live” and “Upload” video are now under the + sign in the middle of the screen.
I edit most of my videos beforehand anyway but I’ve always just hit the camera button, filmed, and then upload that to YouTube.