I played a movie and the jerkiness is hardly noticeable, but still there from time to time - anyway here's the messages stuff - perhaps you can see something there.
cheers
main debug: VLC media player - 3.0.16 Vetinari
main debug: Copyright © 1996-2021 the VideoLAN team
main debug: revision 3.0.16-0-g5e70837d8d
main debug: configured with /Users/d-fu/vlc-3.0/extras/package/macosx/../../../configure '--prefix=/Users/d-fu/vlc-3.0/build/vlc_install_dir' '--enable-macosx' '--enable-merge-ffmpeg' '--enable-osx-notifications' '--enable-faad' '--enable-flac' '--enable-theora' '--enable-shout' '--enable-ncurses' '--enable-twolame' '--enable-realrtsp' '--enable-libass' '--enable-macosx-avfoundation' '--disable-skins2' '--disable-xcb' '--disable-caca' '--disable-pulse' '--disable-sdl-image' '--disable-vnc' '--build=x86_64-apple-darwin17' '--host=x86_64-apple-darwin17' '--with-macosx-version-min=10.7' '--with-macosx-sdk=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk' '--with-breakpad=
https://mac.crashes.videolan.org' 'build_alias=x86_64-apple-darwin17' 'host_alias=x86_64-apple-darwin17' 'CC=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang' 'CFLAGS=-g -arch x86_64' 'LDFLAGS=-arch x86_64' 'CXX=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++' 'CXXFLAGS=-g -arch x86_64' 'OBJC=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang' 'OBJCFLAGS=-g -arch x86_64'