FYI, selling on Etsy is not as free or as easy as this video sounds. It’s not just “Design a tshirt and upload it to Etsy, they do all the work!”
There are hundreds of thousands of Etsy sellers and to get your product seen and sold you DO have to a lot of work. You need to do product research, marketing/ads with SEO, listings optimization, seller customer service, you need to create store components (logo, branding, assets, auto-emails, social media pages), and then you need to be creating/listing products and addressing returns/unhappy customers if any (drop shipping products always gets at least a few)