There’s no issue in the system, the issue is that you’re trying to use a wrong video URL, hence the event form will give you an error message that your video URL is wrong.
Please read the documentation: Slipmat video engines and event video URLs
(Also note that stream ingest URL is not the same as video URL. Stream ingest URL is something that is for your streaming software to use, video URL is an address of a live video from an already encoded video stream.)