this is "Crystal Oscillator" by "Otomata Labs" (Abstract64, Natt, artemka),
an OPL3/YMF262 chiptune written in Furnace, released at Revision 2025 by
entry to the oldschool music compo (which it won, of course)

this is an encode of youtu.be/uL2XWtx3ePk , honestly best experienced with
the live audience reaction in youtu.be/ZqJC7XBihm0?t=3074

below is the encoding notes for this copy, which clocks in at 35.5 MiB
compared to youtube's 157 MiB while also having better sound quality

youtube's h264 is better than vp9 for this so use that,

# big&bad due to the usual lack of bitrate control, eh, was worth a shot
ffmpeg -i "[20250419] [Abstract 64] Otomata Labs - Crystal Oscillator (YMF262) (uL2XWtx3ePk).mp4" -i "[20250419] [Abstract 64] Otomata Labs - Crystal Oscillator (YMF262) (uL2XWtx3ePk).mkv" -map 0:v:0 -map 1:a:0 -vf "eq=1.3:0.1,drawtext=fontfile=LessPerfectDOSVGA.ttf:x=8:y=524:fontcolor=white:fontsize=16:text='youtu.be/uL2XWtx3ePk - Otomata Labs (Abstract64, Natt, artemka) - Crystal Oscillator',drawtext=fontfile=LessPerfectDOSVGA.ttf:x=8:y=546:fontcolor=white:fontsize=16:text='youtu.be/ZqJC7XBihm0?t=3074 - OPL3/YMF262 chiptune released at Revision 2025'" -c:a copy -c:v libvpx-vp9 -b:v 0 -crf 63 -speed 0 -row-mt 1 -y otomata-labs-crystal-oscillator-from-mp4.webm

# this works,
ffmpeg -i "[20250419] [Abstract 64] Otomata Labs - Crystal Oscillator (YMF262) (uL2XWtx3ePk).mp4" -i "[20250419] [Abstract 64] Otomata Labs - Crystal Oscillator (YMF262) (uL2XWtx3ePk).mkv" -map 0:v:0 -map 1:a:0 -vf "drawtext=fontfile=LessPerfectDOSVGA.ttf:x=8:y=524:fontcolor=white:fontsize=16:text='Otomata Labs (Abstract64, Natt, artemka) - Crystal Oscillator - youtu.be/uL2XWtx3ePk',drawtext=fontfile=LessPerfectDOSVGA.ttf:x=8:y=546:fontcolor=white:fontsize=16:text='OPL3/YMF262 chiptune released at Revision 2025 - youtu.be/ZqJC7XBihm0?t=3074'" -c:a copy -c:v libsvtav1 -g 300 -crf 63 -preset 4 -svtav1-params tune=0 -y otomata-labs-crystal-oscillator-svt.webm

# but this looks almost twice as good
ffmpeg -i "[20250419] [Abstract 64] Otomata Labs - Crystal Oscillator (YMF262) (uL2XWtx3ePk).mp4" -i "[20250419] [Abstract 64] Otomata Labs - Crystal Oscillator (YMF262) (uL2XWtx3ePk).mkv" -map 0:v:0 -map 1:a:0 -vf "drawtext=fontfile=LessPerfectDOSVGA.ttf:x=8:y=524:fontcolor=white:fontsize=16:text='Otomata Labs (Abstract64, Natt, artemka) - Crystal Oscillator - youtu.be/uL2XWtx3ePk',drawtext=fontfile=LessPerfectDOSVGA.ttf:x=8:y=546:fontcolor=white:fontsize=16:text='OPL3/YMF262 chiptune released at Revision 2025 - youtu.be/ZqJC7XBihm0?t=3074'" -c:a copy -c:v libaom-av1 -g 300 -crf 63 -row-mt 1 -cpu-used 3 -tiles 3x6 -y otomata-labs-crystal-oscillator-aom.webm

# use audio from furnace export, way better than youtube's opus (and the youtube m4a has dc-offset drifts)
ffmpeg -i ..\Music\demoscene\crystal_oscillator\crystal-oscillator-fur.wav -b:a 160k crystal-oscillator-fur.opus
ffmpeg -i otomata-labs-crystal-oscillator-aom.webm -i crystal-oscillator-fur.opus -map 0:v:0 -map 1:a:0 -c copy otomata-labs-crystal-oscillator.webm