Thank you @nicolaasjan for your yt-dlp builds.
I have made a Windows XP compatible build of FFmpeg that targets a Pentium 4.
I relied heavily on rdp and @Reino build scripts so thanks also to them.
ffmpeg-8.1-630-635cb4543f-win32-static-xpmod-P4.7z
libfdk-aac-2.0.3-158-d8e6b1a-win32-xpmod-P4.7z