These were previously used for background replacement effect, but it seems
like they aren't needed any more and just take up space in filesystem.
Change-Id: I0782ac0c8f109e4f28e9f43c20d30dc6ccd82ef7
There are two sets of 480p videos.
The lower-quality videos are referenced in
VideoPackage1.mk, while higher-quality versions
are referenced in VideoPackage2.mk.
Change-Id: I4d1cec94b677a67abe0ccbbd9a7002995cfcf7bb