You can speed up or slow down the playback speed of a video clip that you have added either on the 'Edit Scene' modal or the 'Advanced Editing' screen.
Follow these steps to change the playback speed:
Step 1: Select the video clip for which you need to change the playback speed.
Step 2: On the right panel, find the tab 'Playback Speed.'
Step 3: Move the slide towards the right to speed up and towards to left to slow down the playback speed.
Please note that the volume of the video clip will be muted if the playback speed is anything other than 1x. The duration of your scene and video will automatically be adjusted according to the speed of your video clip.