i’m a lead engineer at Giphy.com, an approved domain for player cards, and we’re just trying to improve our player experience on the new profiles. we’ve noticed that our players always default to a preview when a new profile is viewed (i have a test profile up here: https://twitter.com/giphymatt2) which sometimes shows our twitter:image value and sometimes defaults to your player_placeholder.png. so far as i can tell the value of twitter:image needs to be of a certain minimum width and height value to appear, but those dimensions don’t appear to be following 68,600 pixel rule outlined in the player card documentation (https://dev.twitter.com/docs/cards/types/player-card).
i’m sure i could figure this out myself easily enough by trial and error, i just wanted to reach out to you all and see if there was an official answer that was just as yet undocumented.
thanks so much!!