The favourite for image-to-video: feed Kling a single still and it produces natural, believable motion from it, which is the job most people actually want done. Quality is high, it handles human movement well, and a daily allowance of free credits makes it easy to try before paying.
It is a Chinese service, so weigh the data terms for anything sensitive, and busy times can mean a queue on the free tier. For bringing a photo to life, few tools do it better.
