Consider `brew install` or `./configure` build for MacOS

The pre-built binaries for MacOS aren't always ideal. `brew install` seems to ensure that everything will work as expected where `./configure` may need a library check test—which is fine and could be left up to the user. Simply throw an error in the install script when `./configure` fails.

The example below works with ffmpeg 5.0 from `brew install`. It _**does not**_ work from _any_ of the pre-build binaries that I've tried, including the one used in the build script.

```bash
cat video.webm | ffmpeg -re -i - -c:v libx264 -preset fast -strict -2 -c:a aac -b:a 128k -f flv -flvflags no_duration_filesize rtmps://global-live.mux.com:443/app/some-stream-id
```