It says there a Vimeo on demand series, but it’s gone
It says you can check it out on their website, but there’s nothing there
My peak impressionable years ended almost exactly the same time the magazine did, and my library had every single issue on microfiche.
Still available for purchase at Amazon, though:
https://www.amazon.com/s?k=omni+magazine
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TFA is just rambling on about the origins of the magazine, but the archive is supposed to be here:
https://omni.media/channel/omni-archive
But on my end it appears that the domain is down.