How to Fix a YouTube Black Screen
YouTube black screen errors can strike at any time, and this problem can be caused by a number of unrelated issues. Some of the most common causes of YouTube displaying black boxes instead of videos include malfunctioning ad blockers, problems with the web browser or computer, and connectivity issues with either the local network or the internet.
You can fix most of these playback problems yourself, but it may take a while to track down the exact reason that you’re seeing black screens on YouTube.