Niner since 2011
ASP.NET MVC writer
@scyonx - Most of the video is relevant but as you pointed out there are changes.
_GlobalImports is now _ViewImports.cshtml. You can't move tag helpers to _ViewStart as it's only for running code.
@scyonx: Bundling/Minification for ASP.NET MVC3. See http://requestreduce.com/
I have a full tutorial on this at https://www.asp.net/mvc/tutorials/aspnet-mvc-4-mobile-features