SpaceX have just released a new video of the second orbital flight test with new views, including stage separation from a camera on the second stage, detailed views of the destruction of Super Heavy, and tracking of the explosion of the Starship upper stage.
Independently, Aviation Week reported that the upper stage had reached a velocity of about 6.7 km/sec and altitude of 148 km when telemetry was lost. Orbital velocity for low Earth orbits is around 7.5 km/sec.