When you share a video to Twitter using the social sharing options in Vidyard, the video will appear as a "card" in your Twitter feed. When clicked the video will play inline.
Twitter is able to present the video in this format because of the information that it obtains from the metatags on the Vidyard sharing page. This includes the player thumbnail, a description (if applicable), sharing page link, etc.
If you have made recent changes to the title, thumbnail or description of a shared video, the information may appear outdated on the Twitter card.
Twitter needs to re-index the content that you have posted to the feed. Re-indexing happens automatically over a period of time.
You can also use the Twitter card validator tool to manually update the metadata associated with your video.