This is an example of an insert edit. An insert edit places the clip in between 2 clips in the timeline. To do this you hold down the Ctrl button and drag the clip between the 2 clips.The time of the video changes because it does not get replaced it actually just lays right next to the other clips. I decided to insert the second clip where i did because it had a good entry to the next clips and it made it look really good. The difference between overlay and insert edit is when you overlay a clip you just drag the clip in the middle between clips and when you insert a clip you drag and press Ctrl in between the clips and when you play it it will keep playing the clip, as the overlay will play alll the way through. I honestly think the insert edit works better because its more clean and easy.