Video of the event: https://www.youtube.com/watch?v=pSpySMH6n0o
So sorry to hear this.
This is the complete video: https://www.bbc.com/news/av/world-us-canada-52707592/snowbirds-crash-video-shows-plane-take-off-and-climb-into-the-air
Did the aircraft lose engines? It appears out of control in the video prior to their ejection in a spin.
RIP young lady.