Zulko/moviepy ? reverse-engineered prompt

Build me a Python library for simple video editing that feels easy to use from a normal script.

I want to be able to load a video, trim it, combine clips together, add text on top, adjust audio, and export the result to common formats like mp4 and gif. It should also support basic compositing, like putting clips side by side or layering them with transparency, plus a few built in effects that make it easy to do common edits without a lot of code.

Make it work on Windows, Mac, and Linux, and keep the API clean and beginner friendly. Please include a few examples for common tasks, like making a short highlight reel with a title card and saving it out as a new file. If anything needs current docs or format details, look them up online and follow best practices.