Depending on your industry and the type of video you create, your video could benefit from more traditional types of publicity, like a press release or publication on a trade website. Working with a PR agency could be beneficial, but you could also reach out directly to site administrators on niche sites related to your field, like health and wellness sites, fitness sites, major food websites, tech sites, and more. Ask to be featured in their newsletter or send them your press release with a link to your video directly — the more official your campaign, the better!
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.