Todd,
First off, thanks for the compliment. We'll have to do an ITProTV swimsuit edition some day :)
Now on to business. I usually recommend people watch all three shows for the exact reason you mentioned. There is a decent bit of overlap, and the more exposure you get to the technologies the better your understanding will be. However, be careful to double back and review your 70-410 notes (or even watch the shows again) after you have finished the three shows because you can start to forget some of the details in the content that are going to be directly questioned on the 410 exam.
Best of luck, and let me know if there is anything else I can do to help.
Don Pezet
Host, ITProTV

Benjamin,
Thank you for pointing that out. For now, both methods are correct. Windows Server 2012 supports the old command and the new command. Future versions of Windows may remove the old command, but that hasn't been confirmed yet. For the record, here are the two:
Old Command (via Command Prompt):
winrm quickconfig
New Command (via PowerShell):
Enable-PSRemoting
The new command is actually an alias for Set-WSManQuickConfig which is the true successor to the old winrm quickconfig command. That wasn't mentioned in the episode and it really should have been. I'll have one of the guys add it to the show notes to avoid confusion in the future.
Thank you for pointing that out and sorry for any confusion it may have caused.
Don Pezet
Host, ITProTV

Well...that's all good. The only question is:
WHY DOES DON LOOK SO CREEPY IN THE THUMBNAIL??
Regards Don, you're the best.

I would like to echo the thoughts of many in this thread that a concise list of PowerShell commands to study for the exam would be very helpful. Even if you cannot teach a whole class on it, just a list of the commands across each of the 70-4xx courses would make it a lot easier to study for the exams.