Evil0ctal/Douyin_TikTok_Download_API ? reverse-engineered prompt

I want to build a tool for downloading videos and data from TikTok, Douyin, and Bilibili. The most important feature is that it should be able to download the videos without any watermarks. It should also be able to grab image galleries/slideshows.

For the user experience, I want a simple web page where I can paste a link—or even a list of links—and it will process them for batch downloading.

Behind the scenes, it should be a powerful API. The idea is that I could use this API to create other tools, like an iOS shortcut that lets me download a video just by copying its link to my clipboard.

Please build this using Python. I know these platforms have tricky security, so the crawler needs to be able to handle their current API requirements. Make it fast and able to handle multiple requests at once. Finally, package the whole thing with Docker so it's easy to deploy.