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Thanks @mixit having to use a different browser to view Instagram videos was very irritating. So irritating that when I came across this thread and it mostly solved my problem I felt compelled to sign up to convey my thanks personally. I'm a regular on a forum where many interesting Instagram videos are embedded and up until recently all was fine. Then one day the embedded videos weren't playing and neither were the same vids on Instagram. They still won't play within the forum, unlike previously, but at least I can click on the video and it opens the original Instagram location in a new tab where they play fine.