Ramping up the speed of your video can give it a fabulous look. For example, applying a fast-forward effect to your video can make narrations and actions funnier. So, use an Online video speed changer to effortlessly change the speed of any video format. Here are the steps: Step 1: Open the video speed tool and click Choose Files to upload your video file. Step 2: Now set the playback speed as 1.25x, 1.5x, or 2.0x. Or drag the Speed slider to the right to choose a custom speed. Step 3: Choose an output format and click Start.