Although I feel this should be expanded on a bit to be a good suggestion, I fully agree with the idea here.
My suggested solution would be as follows:
Save the last 10 seconds when a person retires. This would allow the spectators/commentators to review the crash and give some more perspective. If needed, disable the ability to watch it again afterwards and make the driver appear greyed out (like now) but at least enable it for a single review.