Leo says if he's getting a green video signal, that usually is a sign of a bad video card or driver. Disabling Hardware Acceleration may help. Here's an article from Lifehacker on how. It could also be Flash that's broken. Try reinstalling Flash, or switch to the HTML5 version of YouTube.
Apr 27, 2016 YouTube Sound Works But No Video is Showing? Here's How to Fix In most cases, video not showing on YouTube is caused by wrong browser settings or third-party tools. However, that doesn’t mean YouTube itself can’t be the culprit. The above solutions should be enough to solve the no video on YouTube problem. Can't watch videos from YouTube but I can still hear the Nov 30, 2018 Why Can't I See My Uploaded Video On My YouTube Channel? If this is the case, there isn’t anything that you can do as the issue is with YouTube. Since your videos are being seen and people are leaving comments, the videos are public which is a good thing. I would give it a couple of days and see if you’re videos show up on their own.
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Why doesn't my upload from Utilities to YouTube work
Mar 18, 2019 Why can I hear audio, but not see video on YouTube? | The Leo says if he's getting a green video signal, that usually is a sign of a bad video card or driver. Disabling Hardware Acceleration may help. Here's an article from Lifehacker on how. It could also be Flash that's broken. Try reinstalling Flash, or switch to the HTML5 version of YouTube. Videos won’t play in Internet Explorer