Add comment as per review

setup.py

@@ -89,7 +89,7 @@ def get_ext_filename(self, fullname):
 # FFmpeg. We don't know what FFmpeg version that is, so we build
 # `libtorchcodec.so` without any version suffix.
 # If BUILD_AGAINST_INSTALLED_FFMPEG is not set then we want to build against all
-# ffmpeg major version.
+# ffmpeg major version that are available on our S3 bucket.
 FFMPEG_MAJOR_VERSIONS = (
     ("",) if os.getenv("BUILD_AGAINST_INSTALLED_FFMPEG") is not None else (4, 5, 6, 7)
 )

src/torchcodec/decoders/_core/CMakeLists.txt

@@ -75,7 +75,8 @@ else()
     message(
         STATUS
         "Building and dynamically linking libtorchcodec against our pre-built
-        non-GPL FFmpeg libraries"
+        non-GPL FFmpeg libraries. These libraries are only used at build time,
+        you still a different need FFmpeg to be installed for run time!"
     )
 
     # This will expose the ffmpeg4, ffmpeg5, ffmpeg6, and ffmpeg7 targets