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 alike, 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.