Hey Luisa, I would first have a look around at what already exists in your industry and how you could differentiate yourself from it. For example, two of my favorite cooking channels on YouTube are Bon Appetit and Binging with Babish. Both of these live off of the personality of their presenters, together with a wide knowledge of food. See what new thing you could bring to the table and make decisions from there. Good luck!
However, this only further illuminates the exponential rise of online business today. Considering that the internet is still largely in its infancy, as the modern conveniences give way to near-instant delivery of products via drones, 3D printing and other means, and as virtual and augmented reality help to improve the online shopping experience, nearly all our commerce will eventually be conducted through online channels rather than offline channels.
Some of these promotion techniques may include article marketing, social bookmarking, forum posting, writing press releases, submitting your site to a number of search engines and directories, and blog posting; just to name a few. Most businesses don’t pay their own staff to perform these tasks and choose to outsource all their SEO and SEM tasks instead.
Take it seriously. Yes, you’re applying for an online job. Yes, you can do the work in your underwear, but that doesn’t mean it’s not a “real job”. You must treat it as such or they aren’t going to treat you as a serious candidate. You aren’t the only one who wants to work in their underwear. In fact, the competition online is likely higher than it is in your local area.