Speed Ramping is the most crucial part of video editing. It can make or break your video if you haven’t done it properly. Speed Ramping is the process of changing the speed of your video clip over time.
Add your Clip to the timeline or you can add a video from YouTube by downloading it. After adding the video,
you just have to drag and increase the height of the video track in the timeline. This will show you the speed ramp line in the next steps.
Now Right Click on the Fx button on the expanded clip and choose Time Remapping Then Speed. By default, it has been set on Opacity, now it will on Speed. It will show you a rubber band across your clip now it represents the speed of the clip.
When you drag this band up or down it will change the speed of your clip. If you want to slow down your clip just drag down a little bit to 60-70%. It will slow down your clip. You have to experiment by practicing it.
While using the speed ramp, you need to add some keyframes. To add keyframes CTRL + Click (Windows) or CMD + Click (macOS) on the rubber band. Your keyframes will be added.