how can i download a youtube video?

I am trying to read BD files in from a 3d Blu Ray with the new purchased Blu-Ray Ripper of Win.  The software looks like it is starting to read the files and then I get an error stating that the software will not run on my computer because either my computer is banned or the registration code is banned.  Please let me know what this message means.  It is only installed on one computer, so I am not sure what the issue is?
Thank you,
Rick King
rking@forestridgecolorado.com

osx will be up dated in a week..will this app still work or are you going to do an update soon?

I recently bought some music on my I phone. Now I have a new computer. Who can tell me how to sync the music library on both my computer and my phone without deleting all of the newly bought music. I tunes tutorials are useless to me... don't know what to do :(

I want to make a "best albums of 2013 " video with albums covers and my my audio talking about the video for uploading to YouTube. I can handle the subtitles part, but have no idea about how to add the album covers and audio to the video.

Just purchased dvd and blu ray full ripper 107. I keep getting an error after I use program once close it and start again Qt5Network.dll I am trying to solve but with much trouble. So I keep having to reinstall the program?

I know youtube converts your uploaded video after it's uploaded.
I'm trying to copy the same quality a video has on a computer onto the uploaded version; hopefully you can follow what I'm tryin' to say.

What is the easist way to add overlay text over videos like AVI, MP4, etc..

I just attempted to purchase your product online but it hangs up at the very end.  Can you assist me in completing the purchase or can you find my in process purchase and assist in completing it?