Following Adam's video, I just tried to apply the template featured in his SCCM Training - and all I get are a bunch of errors that "the requested size for resource {snippedstring} is not available in location".
I tried both EastUS and EastUS2 - and got the same results for both.
Looking for suggestions on how to remedy this?
I hope all is well. The template is from GitHib, and is maintained by the community, as I mention in the episodes on how to setup a lab in Azure. If there are changes or issues with it, unfortunately it would not be something that I would be able to help figure out.
Having said that, it sounds like you may be having the issue happening, as noted below:
If that is the case, then you would not be able to spin up the template on the free subscription. The issue is that you CANNOT REQUEST ADDITIONAL RESOURCES FROM MICROSOFT on a free tier subscription. I would suggest instead that you pursue one of the other options I discuss and demonstrate to create your lab, such as locally running VM's in either Hyper-V, VirtualBox, or VMware.
I am not sure if the issue above is the case for you, but if you ARE NOT using a free subscription, then the other issue it could be is essentially the same thing, BUT... YOU WOULD BE ABLE TO REQUEST A BUMP IN RESOURCES FROM MICROSOFT... 
The way to do that, if available to you, is to open a support ticket from within the portal and fill it out. It is submitted directly via the form, once all set to go. Microsoft typically takes anywhere from several hours to a day or more to get back to you, depending on how busy they are and the nature of the request.
You would SPECIFICALLY WANT TO ASK FOR AN INCREASE IN THE NUMBER OF CPU CORES AVAILABLE... from 10 to 75 let's say. That should give you enough to overcome the issue.
Just keep in mind, as I discuss in the episode, that you are paying for these VM's while they are running, and that can get very expensive very quickly....
See if what I suggested makes sense based on the kind of subscription and the limits that you may have. If so, Great !!! , if not, then I am not sure what the issue(s) preventing you from deploying may be, as they could be either with the template, and/or with Azure itself for some reason, neither of which I would have an ability to address.
I hope that gets you moving in the right direction. If I can be of any additional help as you go through the show, or answer any questions for you, please be in touch as needed.
Good Luck !!
Cheers,
Adam