Show HN: Open-source toolbox for agentic video editing

Three examples are shown in the demo video:

* Using code to create a video with an image background, animated text in the top left, and an image in the top corner.

* (using the above video) adding an mp3 as the sound source, with transcribed text appearing in the center, with an animated wave form

* combining two videos- a horizontal video and a vertical video showing someone explaining it