Or something useful, save space, compressing some talk or edu video, just 6 fps is usually enough for slides or code, opus audio can go as low as 32k and still be decent compared to source quality, expect 10-15x size reduction

  ffmpeg -hide_banner -y -i in.mp4 \
    -vf "fps=6,format=yuv420p,scale=960:-2:flags=lanczos" \
    -c:v libx265 -tag:v hvc1 -crf 32 -pix_fmt yuv420p -preset fast \
    -c:a libopus -b:a 82K -application 2048 \
    -c:s mov_text \
    out.mp4

  -x265-params "keyint=800:min-keyint=24:scenecut=20:ref=8:bframes=16:b-adapt=2:rc-lookahead=80:rd=4:subme=5:deblock=1,1:aq-mode=3:aq-strength=0.4:psy-rd=0.4:psy-rdoq=1.0:qcomp=0.7:qg-size=64:rect=1:amp=1:strong-intra-smoothing=1:limit-modes=1:limit-tu=4:rdpenalty=2:tu-intra-depth=4:tu-inter-depth=4:me=star:no-allow-non-conformance=1" \