what downloader to use for streaming video

[impcon]

I have been trying to download all the programs from a television series off of http://onwatchseries.to/ . The site redirects me to a number of program hosts such as Gorilla Vid, Nowvid, Movpod, etc, but when I open the video to watch it and try to download it, I am told that the site does not allow streaming video to be downloaded. I used to download videos from these sites but it seems that something has changed. These videos are for my own personal use and I have tried YTD Video Downloader, a Tube Catcher and several others. Can anyone suggest an easy to use, simple, download utility that will work on these sites? By the way, I am still running XP as I prefer it to the newer platforms. Could that be part of my problem?