It is difficult to predict which factor is responsible for the YouTube TV black screen issue. You should try all the following solutions and solve the issue effectively.1. Restart Your TV2. Check Internet Speed3. Reset Internet Connection4. Re-login YouTube Account5. Reset YouTube App6. Reinstall YouTube App7. Update Your TV Firmware8. Reset Your TVYouTube black screen issues on TV or PC can be due to poor internet connection. Besides, the YouTube TV app can malfunction, and your TV firmware can be outdated.