How to open an mp4 file

New to Audacity.
Need to open an mp4 file.
Getting the following message: xxx.mp4 is an Advanced Audio Coding file. Without the optional FFmpeg library, Audacity cannot open this type of file.

I’m using Audacity Version 2.4.1
Windows 10

Unable to find the link to get FFmpeg.

If anyone can offer guidance, I would greatly appreciate it.
Thank you!

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