You've probably seen now that the CME data fees will go up in February, so this video covers a number of important aspects of keeping your fees to a minimum.
1 - Why you only need data for one of your brokerage accounts
2 - Which data feeds don't allow sharing between multiple apps
3 - Using daytradr with NinjaTrader 8 with no additional data fees
Although this has been a feature since the start, there's a lot of customers that aren't aware of this capability, hence the video.