The following quick tip videos are between 2 and 4 minutes each and they each provide a simple demonstration of various SharePoint functions and features.
SP 2013 – Site navigation menu settings
SP2013 – Change the size of an image in a page
SP2013 – Set an alert on a page
SP2013 – Configure ratings for list and library items
SP2013 – Configure versioning on lists and libraries
SP2013 – Add a list view web part to a page
SP2013 – Add a file to a library (and assign metadata tags)
Syncfusion Metro Icons Showcase
SharePoint Managed Path Overview