Issues playing livestreams via the web

[4netinteractive]

When loading the video stream in a browser we get this error: "No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://localhost:44300' is therefore not allowed access."
We use the videojs javascript library with HLC support to view it, and we also use a Flash fallback scenario.

Is it possible to add the "Access-Control-Allow-Origin" header for 2 sites for our client? Or is there any other solution?