An Extract From an Introductory Lecture
Please
note
that
playing
the
video
will
require
a
reasonable
Internet
connection.
If
you
are
on
a
slower
connection,
I
recommend
that
you
download
the
video
before
watching
it.
To
do
so:
click
on
the
video
icon,
wait
for
the
video
to
start
playing,
click
the
three
vertical
dots
button
(next
to
the
full-
screen button), choose Download.