misc: update README Windows build instructions

Since we removed the requirement for libvlc from the build script,
reflect it in the README.

README.md

@@ -54,22 +54,11 @@ Other examples are in the examples directory.
 
 ### Windows
 
-To build `vlc-rs`, you must either build VLC from source or grab one of the pre-built packages from [videolan.org](https://www.videolan.org/vlc/download-windows.html).
+vlc-rs uses libvlc's SDK and it is a required dependency that must be available at runtime.
+For that, you must either build VLC from source or grab one of the pre-built packages from [videolan.org](https://www.videolan.org/vlc/download-windows.html).
 
-If you're building for `x86_64`, then you should grab the download labelled "Installer for 64bit version".
+Once you've downloaded your chosen package, you should extract it some place such that its path contains no spaces, and add that directory to your `PATH` so `libvlc.dll` is found at startup.
-That installer is actually a self-extracting ZIP archive, so we can extract the contents without installing VLC itself.
+For distribution of an executable program, you should probably copy over the necessary DLLs, as well as the `plugins` directory.
-
-If you're building for `x86`, then you should either download labelled "7zip package" or the one labelled "Zip package".
-
-Once you've downloaded your chosen package, you should extract it some place such that its path contains no spaces.
-To point `vlc-rs` at your VLC package, you should set an appropriate environment variable:
-
-- `VLC_LIB_DIR`: Directory of the VLC pacakge, any architecture
-- `VLC_LIB_DIR_X86` : Directory of the VLC pacakge, `x86`-only
-- `VLC_LIB_DIR_X86_64` : Directory of the VLC pacakge, `x86_64`-only
-
-You should also add the package to your `PATH` variable if you intend to run the program.
-For distribution of an executable program, you should probably copy over the neccessary DLLs, as well as the `plugins` directory.
 
 ## License