Board Thread:General Discussion/@comment-26006155-20190131130037/@comment-26006155-20190309203523

.. although, those video tapes do raise an interesting question.

Asriel and Chara made some of those tapes. But not the first one. And it's uncertain if he made the last one, talking about the Buttercup Plan.

It's possible Sans could have collected some of the tapes, so this isn't firm proof as to Gaster still being around then. But it's somethign to keep in mind.