The world of online video is definitely more than a blip on the radar screen of many of the top venture capital firms. We caught up with Kara Nortman of the top-tier Boston/Menlo Park-based venture capital firm, Battery Ventures. Kara is looking closely at the emerging trend in online video and investing in some cool online video companies. She figures there are about 180 companies in the online video space. She told me about the kinds of companies that the firm finds interesting - and she shares Battery's investment philosophy with The Beet. For all of us in this space, reading Kara's blog, Venture Inside, is a must.