Twitter max video size has changed

[sknebel]

According to https://developer.twitter.com/en/docs/media/upload-media/uploading-media/media-best-practices, it seems like Twitter now supports video up to 512 MB(!). I suppose downstream users might limit earlier, but granary source still references a 15 MB limit.

granary/granary/twitter.py

Line 100 in 64df34a

MAX_VIDEO_SIZE = 15 * MB

[snarfed]

thanks for filing! fixed, and deployed to bridgy. (untested. )

[snarfed]

ideally twitter would publish this number in https://developer.twitter.com/en/docs/developer-utilities/configuration/api-reference/get-help-configuration and keep it updated there, so i could load it dynamically and not have to maintain it as a constant in my own code. they already have a photo_size_limit value there. sadly it seems like that API endpoint hasn't been updated in years, so i'm not holding my breath.