For animal footage specifically, Runway ML is a good choice. You can upload any video, slap on their “Gen-2” tools, and do crazy stuff like swapping dog breeds, adding CGI horns. If you want super realistic edits without the learning curve, Synthesia lets you tweak pre-built animal templates, but it’s pricier. And for free/cheap hacks, try Descript, mostly for editing, but their AI Green Screen feature can isolate animals and drop them into new backgrounds.
Start with short clips to test before dumping a 4K wildlife doc into the AI void. Honestly, half the fun is breaking these tools and seeing what absurdity they spit out. ))