My favorite Keepvid feature is the tool bar add on. With the add on you can keep virtually any video on the web without leaving the website.
I checked out Torch browser: http://www.torchbrowser.com/
At first glance I was pretty curious so I downloaded it. Here are my observations:
1. It's basically a google Chrome browser
2. Torch offers a Chrome plugin
3. I like Chrome because it's light weight and faster then other browsers
4.After downloading I noticed that this was an outdated version of chrome
5. You must have chrome to use Torch unlike keepvid which can be used in any browsers
7. I got an error code which crashed the program:Data Execution Prevention
8. After that error code and the other issues I just uninstalled it.
Bottom line: I would rather use keep vid separately with uTorrent and firefox (I prefer firefox to chrome) to match what Torch is trying to do. Torch has a lot of issues to work out before it's up to par.