I use an IP camera that makes an rtsp stream which can be accessed on vlc or some other rtsp player or something.
If you don’t already have it, get VLC media player (or if you know what you’re doing and already have an rtsp player thing then use that I guess)
Go to Media > Open Network Stream
Where it says enter a network URL put in this:
rtsp://Pogpega:[email protected]:554/stream1
Press play.
If it doesnt work I probably haven’t updated my IP on duckdns