Almost PERFECT - start a video ( I can stop it after confirming it works, just leave the tab open until the download is done ), click this add-on's little balls icon, look for the size I want, click [ v ] ( download ), then wait ... go to other tabs, other browsers, go to bed ( ! ), check it later, and the [ v ] has turned to [ > ] ( play ), meaning that my download is done, yeah! They're located in C:\Users\...user...\dwhelper and I can play them just fine. Improvements? Put a matching highlight and control icon on the video frame being downloaded. Identify attempt to download a duplicate. Grab the description from around the frame, not just from the stream name. A really terrific program for me - THANKS!