Still listening to your video. Don't know if this has been pointed out.
The money on your post. Half does not necessarily go to people that commented. The amount that comes out of it depends on how much people up voted comments. Say I comment and my comment is now $1. $1 will be listed in your total for the blog entry. If your post is listed at $100 you will get $99 and I will get $1.
However, HALF of what you get is going to SBD. The other HALF goes into STEEM POWER based upon current value of STEEM. So if you got $100 pay out... you would get $50 SBD, and $50 Worth of Steem Power... if STEEM was currently worth about $2/steem you would get 25 steem power.
I hope that helped.
EDIT: You can also get STEEM faster than a week by clicking on the menu to the right of your AVATAR and then click on MARKET. You can buy STEEM on the market almost instantly here and convert SBD to STEEM. I did the wait a week thing the first week I was on the site. This is much faster.
As to Steem Power for voting... it doesn't seem to give much in curator rewards until you've gotten at least 50 Steem Power. (this is my observation so far). Steem Power also grows just by having it without you doing ANYTHING.
EDIT 2: I may not be 100% on how the payout happens, but it doesn't seem to be a 50% or even 25% that is taken from posts. It seems more based upon how comments below were upvoted, but their value is added to the total. That seems to be what is happening from 4 weeks of observation, but I could easily be wrong. Clear as mud at the moment. :) It is in beta and a great time to join if you're willing to help make this place better.