A couple of design details didn't quite get settled during our initial review – let's refine these things in order to add the desired level of polish :)

Current

Proposed

• Make video scrim/overlay black (#000000) at 40% alpha
• Change play/pause icons to use either Gridicons (gridicons-play/gridicons-pause) or Material (play_circle_filled/pause_circle_filled) variations. Icon should be white (#FFFFFF) at 70% alpha
• Change placeholder text color to match other placeholder text color ($gray IIRC?) Change image/video caption placeholder text color to $gray #996
• When the video is focused, outline makes block size jump. Can we consider applying an outer shadow so the block doesn't move when selected?