If you’re targeting prospects and hoping to nurture them, you’re hopefully giving them a direct action to take. Measuring the ROI here means simply creating tracking links that will give you this information directly. Increases in your desired action taken should show you your exact lift in revenue. (For instance, if you count an email signup as your conversion, your lift in signups should relate directly to a lift in sales, all other things constant. Plus, you’ll have this user information on file and can then track if or when they convert.)
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.
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