A Developer's Guide to Windows 10 | Channel 9
A Developer's Guide to Windows 10: (20) Live Tiles | A Developer's Guide to Windows 10 | Channel 9
MicrosoftLearningExperiences | Niners | Channel 9
(Windows 10) Samples API concordance
Build better apps: Windows 10 by 10 development series | Building Apps for Windows
"in 10 weeks highlighting 10 of favorite Universal Windows Platform capabilities that ship with Windows 10"