What's the best camera for video blogging?

Define "best". Some define that as: "best under lowlight conditions"; "lowest price"; "smallest"; "has an external mic jack"; "has manual focus"; "has night vision" and many other attributes. Since we don't know your definition of "best" we don't know what might meet your requirements. Camcorders and cameras that happen to capture video as a convenience feature range in price from about $50 to about $80,000. As the price increases, features and capabilities increase - and lenses and imaging chips increase in size. Camcorders at the low end don't have a lot of features and can't behave well under poor lighting conditions. Step 1: set a budget. This should include the camcorder or camera, maybe an external mic or two, a tripod or other steadying equipment and maybe a video light and a case. Step 2: identify the features that are important to you. Step 3: be realistic when setting your requirements. Expecting professional grade equipment for less than about $2,000 is not realistic. Step 4: Check the normal list of suspects: Sony, Canon, Panasonic, JVC. See what there is in your budget - then you can decide if your requirements need to change or if you are willing to modify your budget.