Some popular free video generation AI tools

 Here's a list of some popular free video generation tools:

1. Synthesia (Free Trial): While Synthesia offers a paid subscription with more features, they also have a free trial that allows you to create short AI videos with their digital avatars.
   
2. Kapwing: This online video editor offers an AI-powered video generation tool where you can describe your video and the platform will use stock footage and images to create a video for you.
3. VEED.IO: This free video editing tool includes some AI features, including text-to-video generation and the ability to add AI-powered avatars to your videos.
4. InVideo AI (Free Plan): InVideo offers a free plan with limited features, but it still allows you to use some of their AI-powered tools for generating content and creating videos.

It's important to keep in mind that free plans typically have limitations, such as shorter video lengths, watermarks, or restricted access to certain features. Be sure to check the specific limitations of each tool before you start creating your video.