To resolve this issue, follow the below article:
If the issue still persists, please provide the following information:
• Did you receive any error messages?
• Is this happening to all videos or just with a particular one?
• What is the operating system of your computer (Windows XP, Vista, 7, 8, 8.1, 10)?
• Do you have any security software installed (Norton, McAfee, AVG, etc.)?
The more specific you are, the better I will be able to assist you.