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The request is invalid using Stream video in iframe
I have a Stream video embedded in an internal intranet site using the Share > Embed iframe generated in Stream when clicking on the Share button. The internal intranet site is authenticated using...
I've discovered this same issue today using the Stream web part, works fine in Chrome but in Safari the error appears, you can resolve the issue by navigating to the Stream service (web.microsoftstream.com) and refreshing the page but its not ideal. Looks like Safari doesn't auto log in via the iFrame, which it does in Chrome.