speed / mirroring tools for Youtube

(useful for learning dance from videos, lecture videos, etc.)

to activate

Set the following as a bookmark in any browser and 'click' the bookmark on a Youtube video.

javascript:(function()%7Bdocument.body.appendChild(document.createElement(%27script%27)).src%3D%27https://cdn.rawgit.com/lzil/yt-dance/master/yt-dance.js%27%3B%7D)()%3B

to use

• p to speed up by 0.1x
• q to slow down by 0.1x
• d to mirror (press again to unmirror)
  
  
• s to save current timestamp as START_TIME (default: start of video)
• e to save current timestamp as END_TIME (default: end of video)
• press s/e again to reset START_TIME and END_TIME to defaults
• g to go to START_TIME
• ; toggles auto-replay from START_TIME once video reaches END_TIME
  
  
• . to move forward one frame (base YT functionality)
• , to move backward one frame (base YT functionality)
  
  
• r to reset to 1x unmirrored (original video), no replay, start or end times
• h to toggle help link
  
  
• z to remove this javascript from the video

troubleshooting

• it's potentially interacting with another plugin you have. for instance if used with Chrome's youtube speed plugin then things will potentially break
• for other issues, or comments, contact me at liangz [at] gatsby.ucl.ac.uk