8ba04801a76ee599c7fa40a6407e555a3ea0c0e5
Vimeo plays in the normal lesson view and stops immediately in Present view, which rules the machine out: same video, same host, same codecs, a click earlier. No packages were installed and nothing was changed. Written as a decision procedure rather than a shrug. The first step is a stock Chrome with no classroom policy and a clean profile, which settles in one run whether this is Wonder Ink or something at our end. Two candidates follow if it turns out to be ours, each with the diagnostic that would confirm it, and the note that AutoplayAllowlist is recognised by Chrome 152 but has deliberately not been applied — allowing autoplay on a classroom machine should follow evidence rather than a guess. Co-Authored-By: Claude Opus 5 <[email protected]>
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