How to change multiple file type associations on the Mac at once?

I want to change my default media player in macOS. (In my case, I want to change it to my own AppleScript-created instance of VLC that I exported as ‘VLC-New-Window.app’, which is scripted to always open files in a new VLC instance so that it doesn’t override the existing paused playlist or video file I want to keep in the background.) It is **very** tedious to find an example of every file type I use VLC for (whether mkv, avi, mp4, m4v, m4a, m4b, mp3, flac, or m2ts), right-click on it, and manually set the new default program each time. And honestly I’d like every audio or video file type that VLC *can* open to be applied here so that I never have to worry about this again. Is there any method that can help automate this, or do this in batch?