"source","image","player_seconds","width","height","role"
"Sample video · 160 × 90","frame_0001_0-000s.png","0","160","90","frame"
"Sample video · 160 × 90","frame_0002_0-667s.png","0.666666","160","90","frame"
"Sample video · 160 × 90","frame_0003_1-333s.png","1.333333","160","90","frame"