I asked this question several months ago and have shared your video (that you sent me of a Prius being towed on your dolly) to several people including two on this post. It is very clear by your video that a Prius can be safely towed.
Thank you for sharing the video with me previously. I will continue to share it but just like you posted it here for the OP, you did the same thing with me and I will be purchasing your dolly this summer for this purpose.
Love the sunshine and warmer weather!
Lynne and Jerry RVM 105
2004 Winnebago Itasca Sunova / 2012 Toyota Prius / 2016 ACME EZE-Tow Dolly