What types of speed do I need for different online activities?

“​The size of the average email is about 100 kilobits while the average webpage without video is about 200 kilobits.
A typical video on a webpage may use about 1000 kilobits per second (or 1 Mbps).
An HD streaming video typically ranges between 2.5 Mbps to 4 Mbps.
As you stream video your need for a continuous amount of high speed data connectivity goes up exponentially.”