DreamFlowMachine is a new option where we can make AI zoo videos ourselves with extremely high video quality. It's a really good new option for creating alternative movies. They have three free 5-second videos if you go to the website right now: dfmachine.app
no need for "a site". wan 2.1 is opensource and freely available. well, if your gpu is powerful enough.
it can do some pretty nice things if the input is good enough. it's a i2v model.