Hello, Deb618 I will be happy to help you find a solution.
In most situations, the green screen error when playing a video, appears mainly when we surf the Internet, that is, on platforms such as YouTube. This means that in most cases it is due to a configuration error in our browsers.
As a solution I recommend the following:
Follow these instructions for Chrome:
1- Go to More.
2- Select Configuration.
3- At the bottom of the page, click or press advanced.
4- In "System", deactivate "Use hardware acceleration when available".
If you are using another browser, refer to its help content to learn how to disable hardware acceleration.
In the same way I will be pending before any doubt.