You have your setting in YouTube such that I couldn't message you within YouTube, and the only way I can see here to message you is to pretend to be hiring you!
You draughtsmanship is impressive. I found the site where you have posted your example pictures very difficult to navigate around, but this was possibly my incompetence at work. It must take you quite a few hours to produce such fine pictures, and I wouldn't be able to compensate you properly in money terms for your efforts and skill, but if you are happy to expand your portfolio with works to which you retain copyright, that just happen to serve as illustrations for my videos, then if you give me permission to use the images, I would be happy to credit you prominently. I shall have to give some thought to subjects that would suit. I am busy for the next month, and whatever I come up with is unlikely to surface in that time. Thanks for contacting me. Don't hesitate to remind me, or suggest ideas of your own. I am somewhat distracted by other issues at the moment.
Roughly how long does it take you to create one of the pictures?