Click the search icon at top , search for your video.
Click on the title to add it to playlist.
Hover to Pitch up / Pitch down button to change to pitch.
This site is only optimal for videos not longer than 10minutes now, since the browser will try to load the whole video before playing it. It would take a very long time to laod a long video and possibly causing browser's memory overflow. Still finding better ways to stream the file.