Watch a file while it's still uploading
Asking for one part of a file in progress was already possible; watching one wasn't, because a viewer moves - it plays forward, and it seeks. Now it can. Point a follow job at a file someone is still uploading and it keeps a buffer ahead of wherever you are, re-targeting the moment you scrub somewhere else - and the uploading machine stops working on the stretch you scrubbed away from rather than finishing it first. How far ahead it buffers is measured from how fast you're actually watching, so a proxy and a full-resolution master each get the right amount. If the uploading machine is on the same network as you, it hands you the bytes straight off its own disk before they've even reached the cloud. Worth being straight about the limit: this decides which bytes reach you first, not how fast your connection is - a 4 TB master on a modest office uplink is still hours away whatever the order.