Video Watching Shortcuts

I like to watch how to videos at double speed.  I loose concentration when things move too slowly.  Here's some commands I use when watching videos.  

Youtube:

faster: ctrl + >
slower: ctrl + <
pause: space
forward 5: right arrow
backward 5: left arrow

Watch videos at 3x speed

document.getElementsByTagName('video')[0].playbackRate=3

more

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VLC:

faster: command = 
slower: command -
next: command right
prev: command left
jump forward: ctrl command right
jump backward: ctrl command left
playlist: command alt p