Edit time 2 time lapse videos

We have taken two time lapse videos of an exbibition the first one is around 2,880 frames (shot every 10 seconds for 8 hours) and one about half that. I want to create two videos to put on our website, and cut into the middle of these pictures of some of the staff and visitors to the stand. The videos need to be shorter and so editing is required to cut them down to size and make it look more professional.