Twitter previously announced that it will be putting up a video service much like YouTube as part of its growth strategy. A Twitter user was able to dig up details on the service. Daniel Raffel found the FAQ page for the service and shows bits and pieces of information about the service.
The service will support MP4 and .mov types as well as .jpg and .png for thumbnails. Suggested video aspect ratio is 16:9 with a maximum of 10 minutes per video. No limit on file size though. It will be called Twitter Video and it will have a publishing tool that will have an Upload button in the dashboard as well as quick access for tweeting. Videos will appear in-line on Twitter, much like how they display YouTube videos at the moment.
Source: SlashGear