I don't do this NFT stuff, neither selling or buying. But if you want to get into better quality creations, you could do it yourself: first of all, follow my invitation for Nightcafe: CREATE AI IMAGES WITH NIGHTCAFE - once you are on there see what you can create (test out the free version first, but Pro is very affordable with many more perks). One of the models available lets you animate your creation. But I got a better way, namely I am on Deep Dream, and for 40 credits you can create short videos by uploading up to 4 input images, and Deep Dream turns them into a short 7 second video. Want to know what this could look like, here is one of my videos: MONSTER IN DISGUISE. I looped several of those videos together with Microsoft Clipchamp and published them on YouTube, here is one example:
How about Music? On that above video I added music I created on a site called SUNO - check it out, this is my chanel on Suno OTTO RAPP ON SUNO MUSIC AI
BTW: Nightcafe also has a feature where you can link your creations to your NFT account. Like I said, I am not into that - but I do sell some of my better AI images in my print shop (for fiat money, lol), a separate category: OTTO RAPP - PIXELS PRINT SHOP - AI CREATIONS
This is really awesome with the animation stuff and music, in the past you needed like a multi million dollar budget to accomplish this. Mind-boggling.
another one I didn't mention for short videos is Dreamwombo. In the past I could create transition videos, like from one input image evolving, but now only on a pro plan. I am not going to pay for them all. But images you create on there are very crisp and can be enlarged with whatever photo tool you use. https://dream.ai/ - and those images I can import to Deep Dream and use them to make a video with.
Of course if you search you will find a number of sites where you can make AI videos, but they are all on a pro plan. I take whatever I can get for free. Only one I pay for, so far, is Night Cafe.