Yeah, honestly? The use of AI in terms of art and music alongside poems and stories you wrote yourself clashes. I dont think anyone would think the stories you wrote would be your own since youre already blatantly using AI instead of other types of artistic choices, why would writing be any different?
There are plenty of royalty free music banks for this exact purpose: youtubers who dont want dead air but cant afford to commission/license their own music. Some dont require accreditation, some do, but that’s really just a note in the description + a link to their page/video
as for artists, while commissioning is a good way to get artists to work with you, if you just started and arent making anything off of youtube, i dont doubt people would be willing to collaborate with you for free. While it might have some limitations, as these artists would be doing the work for free, so you would have to be willing to work with them and make compromises, a lot of people do actually need work to expand their portfolio for paid jobs, and so this creates a win-win situation for both of you