Thank you very much for pointing this out, if a play button can be a fallback for those users only I'll put it in there.
I'm a bit weirded out by this being the default even for muted videos. Does that somehow save bandwith because you only get sent one frame of the video? Because otherwise a muted video is just a series of images, and they dont block images by default, right?
I turn off autoplay globally because it's been abused for so long by some news sites, for example, that autoplay a video and then pin it to follow you as you scroll the article.
I find any autoplay, even muted or no audio, to be more of a distraction then helpful in general.
That said, I'm happy to make exceptions for well designed and intentioned sites, and so have allowed it on yours.
In case anybody is wondering, Firefox doesn't block muted videos by default. The above poster had changed their settings to block muted video, which can be overridden per site.