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Here is some code you can try in an <embed> code or Google or Duck Duck Go search other websites for more results

autoplay="false"
autostart="false"

Or try

autoplay="0"
autostart="0"

Experiment

I would experiment trying different codes until something works.

I'm not using an < embed > tag. It's simply a link and Peakd automatically recognizes it as a 3speak video and embeds it for me.

I will tag a Peakd person @flauwy - maybe it's something that can just be fixed internally, because autoplay of 3speak videos embedded via a simple link is an annoying issue.

Sometimes when I refresh the link to the post they do not autoplay, but when I click directly on the link to the post from my blog, they all play at once.

Thanks @joeyarnoldvn for trying to help out.

Is that the only website that does it for you?