Steps to reproduce:
1. If you follow the instructions in MH-11542, with an presentation video and you shorten the already published video that some segments will be removed and the use the publish workflow in the editor you will see that the player runs into an error.
2.The error is based on missing segment previews. In this case the already published segments have not been removed, as some segments are removed in the video though, the player is missing the segment previews for these segments. Additionally the segment timeline will probably be too long.