Nope. Just nope.
The basic unit of data is the
binary dig
it, or
bit. This is abbreviated to
b. It is rare to find these used for anything but transfer rates.
These are typically arranged into groups of eight, called either
octets (rare outside professional networking) or
bytes (
B).
The S.I prefix Mega, or
M (not to be confused with mili, or
m, means
times one million. One megalitre is one million litres , one megabyte is one million bytes.
A slash (
/) or lower case
p means
per. Like kilometers
per hour. A slash is usually preferred, as it cannot be confused with pico.
And finally, a lower case
s stands for
seconds.
A megabyte (MB) is an amount of data. A megabyte per second (MB/s or MBps) is a rate of data transfer, as is a megabit per second (Mb/s or Mbps), though this is one eighth the size.
For twitch, I would expect it to be 5Mb/s UPLOAD. Download is unlikely to matter.