the video in the presentation still doesn't play but at least the
crash is gone

Change-Id: I78ab4ff9412998f235a4b44a23b0e9d3ef4143e0
Reviewed-on: https://gerrit.libreoffice.org/61944
Tested-by: Jenkins
Reviewed-by: Katarina Behrens <Katarina.Behrens@cib.de>