It’s been about a year since Brightcove released the last upgrade to its professional online video platform with Brightcove 3. On Monday, it’s going to release Brightcove 4, and it’s a massive upgrade. Brightcove 4 now supports a native video player on the iPhone, in Facebook, and live video streaming on the Web. It’s got Twitter integration for sharing videos, faster-loading video players, the ability to switch between Flash streaming and HTTP, adaptive streaming based on a user’s device and bandwidth, behind-the-firewall video delivery, support for most major ad servers, better analytics, and a new, cheaper, entry-level subscription service called Brightcove Express.