Hi there! I understand you're having trouble playing videos and heats on the World Surf League app using Microsoft Edge, and all you see is a black screen. You also mentioned Norton antivirus is running on your system. I'd be happy to help you troubleshoot this!

To start, could you confirm a couple of things for me?
1. Are you unable to play only WSL videos, or do other videos (like YouTube) also show a black screen?
2. Have you tried any steps so far to fix this, like refreshing the page or restarting the browser?
3. Is your Microsoft Edge browser fully up to date?

Meanwhile, here are some initial steps to try. Norton sometimes can interfere with video playback, especially on browsers like Edge:

1. Disable Norton temporarily:
- Temporarily turn off Norton's real-time protection and see if the videos play. This will test if Norton is blocking content.
- If the videos start playing, we'll look into adding Edge or World Surf League site to Norton's exceptions list.

2. Clear Microsoft Edge cache:
- Click on the three dots menu > Settings > Privacy, search, and services.
- Under Clear browsing data, click 'Choose what to clear'.
- Select 'Cached images and files' and 'Cookies and other site data', then Clear now.

3. Check for browser updates:
- Click the three dots menu > Help and feedback > About Microsoft Edge.
- Update if an update is available and restart the browser.

4. Disable hardware acceleration in Edge:
- Go to Settings > System and performance.
- Toggle off 'Use hardware acceleration when available' and restart Edge.

5. Try in InPrivate Window:
- Open a new InPrivate window (Ctrl + Shift + N).
- Navigate to the World Surf League app and try playing a video.

If you let me know the results of these steps and answers to my initial questions, I can guide you further! If these don't solve it, we might need to look deeper into Norton settings or Edge's advanced configurations.

Are you able to try these out and let me know?