Sadly, posting a video on an otherwise blank page won’t do much for your SEO. Make sure you embed your video on a page full of relevant and informative content. This will let search engine crawlers know you have not only engaging multimedia on your site, but that you provide a ton of valuable and useful information. Be sure the content relates to your video — sometimes, posting the video transcript can help a lot, too.
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.