Accelerate is a powerful, fully customizable extension for controlling video playback in Safari. With this tool, you can change the playback speed of any HTML5 video in Safari. You can personalize the keyboard shortcuts for speed controls. In addition, you can set additional shortcuts for playback controls. Furthermore, you can customize the default speed, the preferred speed, the speed change interval, and the skip interval. The tool supports Picture-in-Picture and AirPlay. It works with YouTube, Netflix, Hulu, Vimeo, Twitch, and many more.