You can download videos from YouTube using RealPlayer/RealTimes. If you are unable to do so, follow the steps provided in this article: https://customer.real.com/hc/en-us/articles/204040433-Download-This-Video-option-does-not-appear
If the issue persists, please provide the following information:
• Are you able to see the "Download This Video" option?
• Do you receive an error message? What does it say?
• Is this happening to all videos, on all sites or just with a particular one?
• What web browser do you use, and which version? (See https://customer.real.com/hc/en-us/articles/207275617)
• What version of RealTimes or RealPlayer is installed? (See https://customer.real.com/hc/en-us/articles/204039513)
• 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.