It’s easier than ever to shoot high-definition video. You can do it with traditional-style camcorders, of course, but also with cameras that also are designed to take still photos — from high-end digital SLRs to cameras that slip into your shirt pocket. I’ve got recommendations in all three categories — listed here from least to most expensive. All of these record HD video and have HDMI output connections that let you view your masterpieces on an HD display.