In addition to the prohibition of work, as on the Sabbath, there are five activities specifically prohibited on Yom Kippur:
eating and drinking,
anointing oneself with perfumes or lotions,
washing (for pleasure), and
wearing leather shoes.
I got a good laugh out of a young man's list of prohibitions for Yom Kippur. Notice what he says is prohibited at 40 seconds into the video. Does that mean that after Yom Kippur, it is allowed?
But, seriously, I must commend him for his poise and speaking ability. I doubt I could speak in front of a camera as well as he does, especially without a teleprompter.
(Incidentally, the Hebrew date should read 5771.)