I have the same problem. I need the ability to pause the recording of a video presentation in order to set up the next resource, blow my nose, get my dogs to stop barking and so on. As it stands now, I have to stop recording and use a video editor to combine the pieces. This feature seems so simple and useful, I must have missed something in the documentation. I couldn't find a pause feature in the hotkeys dialog or in a search of all the OBS resources.