This is any form of content which was paid for, usually by a company promoting another company or brand. It is written in the style of the site publishing it, much like native advertising, but isn’t actually an ad — it’s a valuable piece of written or visual content meant to inform the viewer. Usually, sponsored posts get organically shared via social networks, too, so they get an extra push when it comes to distribution.
Professional cameras, like DSLRs, give you fine control over the manual settings of shooting video and allow you to achieve the shallow depth of field (background out of focus) that people rave about. While they're primarily used for photography, DSLRs are incredibly small, work great in low light situations, and pair with a wide range of lenses — making them perfect for video. However, DSLRs do require some training (and additional purchases) of lenses.