Great explanation , first of all!

Alcator says:

7. Check your replay with very bad driving and with respawning. Frequently, the replay expects the player to fly through checkpoints in one smooth go, and if the player respawns, the camera shot just runs ahead, leaving the player hopelessly behind. You don't want that.

To build off this I suggest that you create a new clip for each checkpoint on your track and put the trigger right at the checkpoint to allow for the player's respawning not to ruin the cinematics.