Timeshift - how can I do this?

Hello,

When I was using my previous tuner (rented from operator), I could watch half of a movie and then decide to record it all - since the beginning of event until the end. And it would create one file.

Can I do something like this with PTS enabled?

When I press record it asks me to choose one of many options but none seems to do exactly what I want :-/

Any hint will be apprecieted :-)