How to set the double speed/speed of exporting runway videos

Question: How to set the double speed/speed of exporting runway videos

Solution: Go to Runway Settings ▶ Animation ▶ Playback Time Scale

Adjust the playback time scaling to the desired speed (faster or slower). For example, if the playback time scaling is set to 2, the total playback time will be twice the original video length, which means the playback speed will be half of the original speed.

After making the adjustments, you can export the video.