Blue Origin capsule blasts away from booster after anomaly during launch

Looking at the video, it seems like the BE-3 engine was having some trouble for about 3 seconds from T+01:01 to T+01:04 - just before the escape system was triggered. In fact, it looks to me like the entire aft section of the vehicle just disintegrated before the escape system plume covered its view. It might very well be that the escape system saved the crew.

Edit: Looking further at the video, it looks like the vehicle also lost attitude control and started tilting at that instant. It could easily be due to the loss of propulsion and thrust vector control. However, it also happens at a very critical stage - close to maximum dynamic pressure (Qmax). Any increase in angle of attack at that stage would put enormous aerodynamic loads on the airframe.