Word(s) for Wednesday

Okay, all writers out there should already know these terms but just to be sure, here's a short quiz. Define each word below -
then come back at 3:00 to find out,
in case you have any doubt,
the answers will be posted here.
So no need to have any fear.

Word(s):

(1) Vlog
(2) Podcast
(3) Vlogger

Take a guess.