You want a finished video for free, today. Use StoryShort or Clipfly. Both generate free, and if the gameplay-background format is what you wanted, you should not be paying anything at all.
You are on a phone and just want to try it. Use PerfectCorp's YouCam. Free, browser-based, nothing to install — the right amount of commitment for a first attempt.
You only need a character or an image. Use BasedLabs or Media.io. If the visual is the deliverable and you will write and edit the rest yourself, paying for a production pipeline is wasted money.
You want to test the writing before paying for pixels. Frutti writes the full episode — scenes, cast and dialogue — free and without an account, and only charges when you render. If the script is not good, you have lost nothing; if it is, you already know what you are buying.