Change the speed of clip based on sound track in Premiere pro
you can change the speed of the video making it slow to or fast in order to fit the timing of the music you are using. 

How to change a speed duration of the clip?


Right click on the clip
Click Speed/Duration
Adjust the speed. The higher the percentage the faster the clip. The lower the percentage the slower. 


Important Notes: 

If you increase the speed the clip will be shortened
If you decrease the speed making it slow it will extend the duration of the clip