Interesting and useful video

I've been fooling around with computers for 40 years.  You'd think I'd be a whiz by now, but not really.   Here's some stuff that I think I can use.  Maybe you can too.

Update:

A cheatsheet for windows.  For macs, you have to watch the video---sorry.

For a new desktop, press windowkey plus control plus D, to switch between desktops, press windowkey plus control plus arrow key, to close a window, press windowkey plus control plus F4.

To return to the desktop ( minimize all windows ) , press windowkey plus M, for a peek ( temporary view of the desktop, press windowkey plus comma

To run an app on the taskbar, press window key plus the number 1-9, which corresponds to its position on the taskbar

To run a split screen for two apps:  start the app, then press windowkey plus left arrow.  For the other half, press right arrow as above.

To run file manager, press windowkey plus E

To open the magnifier, press windowkey plus the plus key, to make it smaller again, press the minus key

To take a screenshot windowkey plus printscreen
To open action center press windowkey plus A 
To adjust settings, windowkey plus I

To lock the computer windowkey plus L