Directions for installing FFmpeg for video dumper.

Installing-FFmpeg-for-the-Video-Dumper.md

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+If you try to use the video dumper without a compatible install of FFmpeg, you will receive an error message indicating so with the version of FFmpeg you need to install. This guide will walk you through installing a compatible FFmpeg to enable using the video dumper feature.
+
+## Windows
+
+Windows builds of FFmpeg can be found linked from the official FFmpeg website.
+
+1. Choose a build that matches the version indicated to you by Citra; for example, if Citra tells you to use a version from the "n6.0..." series, download FFmpeg 6.0.
+    * Make sure to download the release archive with ```shared``` in the name to get all the files you need for Citra.
+2. Once you have downloaded FFmpeg, extract it somewhere.
+3. Inside the extracted directory, head to the ```bin``` directory and copy all of the ```.dll``` files you see into your Citra install directory.
+
+After completing this process, you should be able to use the Citra video dumper.
+
+**NOTE:** If you use a Windows package manager like ```winget```, there are likely packages available that you can use instead to install FFmpeg.
+
+## Other OSes
+
+Other operating systems have package managers that allow you to easily install a compatible FFmpeg.
+
+### macOS
+
+Use Homebrew: ```brew install ffmpeg```
+
+### Linux
+
+If you are using the Flatpak, you should not need to install FFmpeg as it is part of the runtime.
+
+If you are using the AppImage, you can install a compatible version, FFmpeg 4, as follows:
+
+* Ubuntu: ```sudo apt install ffmpeg```
+* Arch Linux: ```sudo pacman -S ffmpeg4.4```
+* Fedora: ```sudo dnf install compat-ffmpeg4```
+
+Note that if your distro version uses the wrong version of FFmpeg for Citra, it will still fail to load. In that case you must find a compatible version of FFmpeg built for your distro, or you can build Citra from source to use the version of FFmpeg you have installed.