diff --git a/third_party/ffmpeg/multi/CMakeLists.txt b/third_party/ffmpeg/multi/CMakeLists.txt
index 16d2db96754..5164fa75cd8 100644
--- a/third_party/ffmpeg/multi/CMakeLists.txt
+++ b/third_party/ffmpeg/multi/CMakeLists.txt
@@ -47,7 +47,12 @@ if (APPLE)
   else ()
     message(
       FATAL_ERROR
-      "CPU architecture ${CMAKE_SYSTEM_PROCESSOR} is not currently supported. If you do not need FFmpeg integration, then setting USE_FFMPEG=0 will bypass the issue.")
+      "${CMAKE_SYSTEM_PROCESSOR} is not supported for FFmpeg multi-version integration. "
+      "If you have FFmpeg libraries installed in the system,"
+      " setting FFMPEG_ROOT environment variable to the root directory of FFmpeg installation"
+      " (the directory where `include` and `lib` sub directories with corresponding headers"
+      " and library files are present) will invoke the FFmpeg single-version integration. "
+      "If you do not need the FFmpeg integration, setting USE_FFMPEG=0 will bypass the issue.")
   endif()
 elseif (UNIX)
   if ("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "aarch64")
@@ -86,7 +91,12 @@ elseif (UNIX)
     # Possible case ppc64le (though it's not officially supported.)
     message(
       FATAL_ERROR
-      "CPU architecture ${CMAKE_SYSTEM_PROCESSOR} is not currently supported. If you do not need FFmpeg integration, then setting USE_FFMPEG=0 will bypass the issue.")
+      "${CMAKE_SYSTEM_PROCESSOR} is not supported for FFmpeg multi-version integration. "
+      "If you have FFmpeg libraries installed in the system,"
+      " setting FFMPEG_ROOT environment variable to the root directory of FFmpeg installation"
+      " (the directory where `include` and `lib` sub directories with corresponding headers"
+      " and library files are present) will invoke the FFmpeg single-version integration. "
+      "If you do not need the FFmpeg integration, setting USE_FFMPEG=0 will bypass the issue.")
   endif()
 elseif(MSVC)
   FetchContent_Declare(