Revert "Simplify thumbnail styling to have consistency with mobile implementation"

Causes significant breakage for videos, author not around this week to address concerns.

This reverts commit b0012d2aeb6a5ef8172223c58ceb8fa5c78c5138.

Change-Id: If1d7ba81b47b9351427111a9060ea9893c87c96e
Merge "Revert "Simplify thumbnail styling to have consistency with mobile implementation""