We routinely tested KnittingHelp.com on the most popular browsers to ensure things work as they should. Sometimes we miss something or sometimes a new browser comes out and causes something to act weird. But as of recently, the site, including search, should work on great on the usual suspects of browsers: IE, Firefox, Safari, and Chrome.
I am planning on pushing up our schedule for having a video search implemented into KH. I may try to cobble together a quick beta in the next few days and release it. I will let you know by posting here.