An hls stream (m3u8 format) integrated via URL Import in authoring area is not displayed in Firefox and Chrome-based browsers (+Chromium, new Edge). Error message: Content Security Policy: The page settings have blocked the loading of a resource on https://cdn.jsdelivr.net/npm/hls.js@latest ("script-src").
Safari, old Edge and Explorer seem to have the resource locally, so no problem with these browsers.
If CSP is deactivated, the stream is also displayed in all browsers.
The resource can be referenced locally - no reloading of external resources.