Nothing works, as every plugin that I use is ineffective, and even the *opera-specific setting/content info is at least 3 years out of date and worthless…
*Unless, I can get the updated info, which is the point of this post…
And no, the HTML5 no autoplay plugin does not work!
The only effective way I found to block IG's infuriating autoplay is to not use the Opera browser at all!
Thanks in advance for any info that you can provide!
Edit: I went to : opera://settings/content/siteDetails?site=https%3A%2F%2Fwww.instagram.com%2F and there is no listing item for video.
Though there IS a disable sound option, so it looks like Opera is a crappy browser for IG and the only way to stop IG's infuriating video autoplay is to stop using Opera altogether…
As I have no problem with IG's autoplay, with Vivaldi/Brave/FireFox, though I prefer Opera over those other browsers…
Edit2: Whelp, it looks like this browser allows for video autoplay as I went here ⇒ opera://flags/#autoplay-policy and could not find anything related to disabling video at all, so it does indeed look like Opera is the worst browser for IG after all!