you didn't fetch the video, but 6.8.2. Videos from unsupported players says the following about this: "If it is not possible to represent the widget as an iFrame, but it is possible to get a direct link to the video, use this link to generate a <video> with the correct src attribute."
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6.8.2. Videos from unsupported players says the following about this:
"If it is not possible to represent the widget as an iFrame, but it is possible to get a direct link to the video, use this link to generate a <video> with the correct src attribute."