Introduction to Scratch
Scratch is a visual programming language that allows students to create their own interactive stories,
games and animations. As students design Scratch projects, they learn to think creatively, reason
systematically, and work collaboratively. Scratch was created by the Lifelong Kindergarten group and MIT
Media lab and is available for free download at http://scratch.mit.edu. Once Scratch is downloaded to a
computer, you do not need Internet access to create a project. 

You can only play the animation inside the program. To make an offline video you can use a screencapture progam. An example is "VSDC Free Screen Recorder". I have made a funny video. To manage the video I also use Adobe Premiere Elements 2020.

See: https://youtu.be/efryX2qoNtQ