Also note that the way the video is linked/embedded changes over time. About a year ago, the best program to fetch youtube movies was clive. It was written in perl, which it was keeping up-to-date and kinda always worked. When it stopped working I switched to youtube-dl. It is written in python. Sorry to curse in this church. You could probably fetch clive and try if it now works for you. If it doesn't, you can fix it. It is open source.