EmbeddedPreview:With Video Loop

Build 3449 on 22-08-ZL-fix-pagewrapper-styling
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Baseline History
Build 34492247712
Current build. There are unaccepted changes, so build 3439 is still the baseline.
Build 34204029c96
Accepted by Siyang Cao.
Build 34096c57449
Auto-accepted
Build 340234ccdf4
Auto-accepted
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