https://techcrunch.com/2021/10/28/twitter-blue-introduces-labs-to-give-users-early-access-to-new-features/

Twitter is rolling out a new feature called ‘Labs’ for Twitter Blue, its premium subscription service. Labs will give Twitter Blue subscribers early access to features that Twitter is testing as a part of that bundle, which is currently only available in Canada and Australia.

Now, Labs subscribers now have the ability to upload videos that are up to 10-minutes long from their desktop. Standard users currently only have the option to upload videos that are up to 2 minutes and 20 seconds long. Additionally, iOS users can now swipe to pin their favorite conversations to the top of their direct message inbox.