For example,
https://dev.twitter.com/ads/reference/put/accounts/%3Aaccount_id/cards/video_app_download/%3Aid
Parameter app_country_code is marked as required. The one of other types of cards is optional, and the example below contains no app_country_code, either. Other common parameters of video app download cards, like name, iphone_app_id and etc., are not consistent with other types of cards, either.
I’m afraid that the documents of video app download card is not accurate. Can you guys have a look?