Self Promotion in video

Can you tell me how much you are allowed to self-brand on Udemy? I already have a long format course I host on a non-Udemy site (totally self promoted). Would like to do a similar topic but more focused and shorter on Udemy. How am I allowed to mention my longer class? I think it would be an important part of my background but don't care to mention often in my Udemy course b'c heck, they just bought something. Can I put my logo in the bottom corner of the Udemy video??

Thanks