I am using the ESP32_CAM with a camera stream for MJPEG files. Code here. https://github.com/arkhipenko/esp32-cam-mjpeg
It runs fine and shows a 320*240 image when I bring up a browser or VLC. I open the camera control and type in the URL of the stream it generated
http://my.cam.ip.xxx/mjpeg/1 (The same one I use in VLC) and the camera initialises but doesn't actually open (The virtual camera lens stays closed) . Anyone else stream mjpeg cameras in? The manual hints there is support.