When I click on Get Video, a window appears saying that there is a problem connecting to TubeTilla. Could you please help me?
TubeTilla Free seems to have been discontinued and its downloading algorithm is no longer supported by the latest security used by video-sharing websites like YouTube. The best advice that I can give you is to try a different tool like YouTube Converter & Downloader (which is an online service) or one of these alternatives that you can find on SI.