Thumbnails for videos

[geckoslair]

We need different thumbnails for videos.

Twitter Image to be displayed in place of the player on platforms that don’t support iFrames or inline players. You should make this image the same dimensions as your player. Images with fewer than 68,600 pixels (a 262x262 square image, or a 350x196 16:9 image) will cause the player card not to render. Images must be less than 5MB in size. JPG, PNG, WEBP and GIF formats are supported. Only the first frame of an animated GIF will be used. SVG is not supported.

Facebook Suggested is 1200 x 630. I think that squared it's better 1200x1200 (it crops better).

oEmbed We'll use one of the size above. =)