RN0.63 11/16: Fix Flow bug when merging Media
RN0.63 11/16: Fix Flow bug when merging Media

Summary: Flow is worried about `Video` getting merged with an `Image`

Test Plan: Flow

Reviewers: palys-swm

Subscribers: KatPo, zrebcu411, Adrian

Differential Revision: https://phabricator.ashoat.com/D321

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