Pixels track everyone who comes to your site, and you can build custom audiences around them. For example, if you post content about how to learn to drive a semi-truck, and you track visitors with pixels, you can then market truck driving certification to people who have already shown an interest in that already because they visited that specific page. And your conversions will skyrocket.
Want to get the word out there and boost your visibility on social media without taking years to build the audience? Then you should certainly leverage influencers. But the key is to find the right influencer. You don't have to go with influencers with millions of followers. You could opt for micro-influencers with tens of thousands or even a hundred thousand followers.
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.