Yes, we have a YouTube channel. I post a variety of videos there, but generally they are about how to use FreeDOS, or showing off DOS applications, playing DOS games, or "how-to" videos about programming on DOS. New videos come about once a week. A few recent videos that may interest you: Playing the RetroFuel game, Calculate the Fibonacci Sequence in a spreadsheet, and Printing TheDraw data from a C program. Someone asked me how to use OpenWatcom to use graphics mode, so I recently posted a few videos on that: A "color bars" test pattern and Writing a board game in graphics mode. And watch for these new videos, coming up soon: A brief history of the spreadsheet (including the evolution of DOS spreadsheets), Tomb Raider 1 (a great classic game!), RCross (car racing game), and a few other videos on graphics programming (such as getimage/putimage). Subscribe now so you don't miss new videos!
I'm also planning a "how-to" video series about how to use a spreadsheet. I'll use my favorite DOS spreadsheet to teach you how to use a spreadsheet effectively, from basic concepts to more advanced features. As you'll see in the "brief history of spreadsheets" video, modern spreadsheets like Excel, LibreOffice, or Google remain quite similar to classic DOS spreadsheets like Lotus 1-2-3 and QuattroPro. So everything you learn in the spreadsheet video series will apply to modern spreadsheets too (and yes, I'll cover the differences). Those videos will be on my Patreon first, but will make it to the YouTube channel after a few weeks.