Merge commit '7453da3f420b74f5bb135d5895b82dca9c015bb3' * commit '7453da3f420b74f5bb135d5895b82dca9c015bb3': Extract video thumbnails from the largest sync sample among the first 20.
Merge commit '7453da3f420b74f5bb135d5895b82dca9c015bb3' * commit '7453da3f420b74f5bb135d5895b82dca9c015bb3': Extract video thumbnails from the largest sync sample among the first 20.