Step 1: Understand the task
The task is to provide information or resources related to ai生视频免费, which translates to AIgenerated video for free.

Step 2: Identify relevant information
To address the query, we need to consider what ai生视频免费 implies、It suggests a search for tools, software, or platforms that can generate videos using artificial intelligence (AI) without any cost.

Step 3: Research available options
There are several AI video generation tools available online, some of which offer free services or trials、These can range from simple texttovideo platforms to more complex AIdriven video editing software.

Step 4: List potential free AI video generation tools
1、DeepBrain AI: Offers AI video generation with avatars and texttospeech functionality.
2、Lumen5: A platform that turns text into animated videos.
3、InVideo: Provides templates and AIdriven video creation.
4、Pictory: Uses AI to help create short videos from longform content.
5、Synthesia: Known for AI avatars that can be used to create videos.

Step 5: Consider limitations and specifics
While these tools offer free versions or trials, their free plans often come with limitations, such as watermarks, limited export options, or restricted access to advanced features.

Step 6: Provide a concise answer
For those looking for ai生视频免费, there are several options available, including DeepBrain AI, Lumen5, InVideo, Pictory, and Synthesia、Each has its own set of features and limitations, especially in their free versions.

The final answer is: $\boxed{DeepBrain AI, Lumen5, InVideo, Pictory, Synthesia}$