Seems my last message hasn't made it here yet, but had a look at You Tube and sure enough, Amiga Demos have been uploaded there at: https://www.youtube.com/watch?v=pssH6moTGLc https://www.youtube.com/watch?v=cKy57re_6BY https://www.youtube.com/watch?v=c5kuYfTCGLg
And others to mention a few you can watch. Been a while since I saw an Amiga Demo last, till now ;)

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