Can an 11-year-old market his wares with photography and video? Yes!
My son Liam makes paracord bracelets and wanted to sell them, so I suggested he make a website. I told him to learn HTML to code the page and I'd help him if he needed it.
He borrowed an "HTML for Dummies" book from the library, used Google a lot to find answers, and wrote 95% of the code for his page without my help. Then we went to the studio to make some product shots and a funny video.
If a pre-teen boy can market his business with photography and video, what's stopping you? Need help? Drop me a line.