It downloads vids OK but the dl'ed videos stop for an instant every several seconds, making anything unwatchable. This is due to the dl'ed file being a .ts file. I had to use my VLC to convert it to a mp4 to make it play smoothly.

One big advantage to this dl'er over some others is that you don't have to keep the original tab open to keep the dl from stopping.
Thanks for your work on this product.

Working for now. I'm testing to download a streaming video. If you see this comment after 1-Jun-2020, it means this extension actually work.