Part of the goal of improving screen-sharing is that transitions between VbSS and RDP be as seamless as possible when they occur. VbSS makes use of the media platform (which relies on UDP as the underlying protocol), with the goal of improving your video start times, the viewing quality of what you're watching (especially if what you're watching is moving fast), and reliability overall. Skype for Business Server wanted to improve people's 1-to-1, and their 1-to-many (multi-party) conversations and meeting experiences. Newer technology, VbSS, will make use of User Datagram Protocol (UDP). Screen-sharing uses the remote desktop protocol (RDP), which is great at creating thousands of 1-to-1 sessions between people's computers. The difference between VbSS and traditional screen-sharing has to do with the underlying protocols used, and what they excel at. Video-based Screen Sharing, or VbSS, grew out of Lync screen-sharing. VbSS is included with Skype for Business Server 2019.
Video-based Screen Sharing (VbSS) in Skype For Business Server 2015 is now available for download: Skype for Business Server 2015 Cumulative Update KB3061064.
