The Alexa Developers Twitch Channel is the place to go if you are looking for in-depth instruction on creating Custom Alexa Skills
Here is an Index of the Video Series that are available
The Joy of Voice
Alexa Evangelist Jeff Blankenberg presents a multi-part series on creating an Alexa Custom Skill that features Start Wars information.
Episode # 1 – https://www.twitch.tv/videos/250659801
Episode # 2 – https://www.twitch.tv/videos/253903878
Episode # 3 – https://www.twitch.tv/videos/262045418
Episode # 4 – https://www.twitch.tv/videos/261515295
Episode # 5 – https://www.twitch.tv/videos/264606942
C + C Hacking Factory
In this 8 part series, Alexa Evangelists Cami Williams and Cassidy Williams create an Alexa Skill-based game, complete with Echo Buttons
Episode # 1 – https://www.twitch.tv/videos/261514815
Episode # 2 – https://www.twitch.tv/videos/263954724
Episode # 3 – https://www.twitch.tv/videos/263954724
Episode # 4 – https://www.twitch.tv/videos/267103758
Episode # 5 – https://www.twitch.tv/videos/267816279
Episode # 6 – https://www.twitch.tv/videos/269308438
Episode # 7 – https://www.twitch.tv/videos/275601588
Episode # 8 – https://www.twitch.tv/videos/285389471
College Coach
Multi-part series where Paul Cutsinger (Head of Alexa Voice Design Education) and Justin Jeffress (Alexa Evangelist) along with various guests, create an Alexa Skill to assist a User in making a decision on the selection of a College to attend.
Episode # 1 – https://www.twitch.tv/videos/257516300
Episode # 2 – https://www.twitch.tv/videos/262031659
Episode # 3 – https://www.twitch.tv/videos/263953949
Episode # 4 – https://www.twitch.tv/videos/269311442
Episode # 5 – https://www.twitch.tv/videos/260161591
Episode # 6 – https://www.twitch.tv/videos/261641341
Episode # 7 – https://www.twitch.tv/videos/261997231
Episode # 8 – https://www.twitch.tv/videos/262708818
Episode # 9 – https://www.twitch.tv/videos/263873444
Episode # 10 – https://www.twitch.tv/videos/264218114
Episode # 11 – https://www.twitch.tv/videos/264597131
Episode # 12 – https://www.twitch.tv/videos/264968709
Episode # 13 – https://www.twitch.tv/videos/269308741
Episode # 14 – https://www.twitch.tv/videos/269308839
Episode # 15 – https://www.twitch.tv/videos/268118058
Episode # 16 – https://www.twitch.tv/videos/269306166
Episode # 1 7- https://www.twitch.tv/videos/269665082
Episode # 18 – https://www.twitch.tv/videos/270428007
Episode # 19 – https://www.twitch.tv/videos/270447622
Episode # 20 – https://www.twitch.tv/videos/270847115
Episode # 21 – https://www.twitch.tv/videos/272033370
Episode # 22 – https://www.twitch.tv/videos/272421263
Episode # 23 – https://www.twitch.tv/videos/273837980
Making Money With Alexa Skills
A multi-part series where Alexa Evangelists Memo Doring and Jeff Blankenberg discuss how to make money with Alexa Skills
Episode # 1 – https://www.twitch.tv/videos/262022441
Episode # 2 – https://www.twitch.tv/videos/262380061
Episode # 3 – https://www.twitch.tv/videos/264609269
Episode # 4 – https://www.twitch.tv/videos/264612979
Episode # 5 – https://www.twitch.tv/videos/264614234
Episode # 6 – https://www.twitch.tv/videos/264682611
The Interview Series
A multi-part series where Paul Cutsinger, who is the Head of Alexa Voice Design Education, interviews personalities from the Voice World
Episode # 1 – Interview with Vasili Shynkarenka Co-founder of Storyline – https://www.twitch.tv/videos/252049085
Episode # 2 – Interview with Bob Stolzberg and Mark Tucker from VoiceXp – https://www.twitch.tv/videos/282619937
Episode # 3 – Interview with Gary Vanerchuck, CEO at VanderMedia – https://www.twitch.tv/videos/283155765
Episode # 4 – Interview with from Oren Jacob, CEO at PullString – https://www.twitch.tv/videos/286594284
Alexa Smart Home API
A multi-part series where Alexa Evangelist Mike Mass discusses various Alexa Smart Home API topics
Episode # 1 – https://www.twitch.tv/videos/236254801
Episode # 2 – https://www.twitch.tv/videos/281570346
Episode # 3 – https://www.twitch.tv/videos/284305086
Episode # 4 – https://www.twitch.tv/videos/287042666
Episode # 5 – https://www.twitch.tv/videos/287079190
Episode # 6 – https://www.twitch.tv/videos/293189889
Live from Voice Summit 2018
Alexa Evangelist Memo Doring interviews various Voice personalities live from the Voice Summit 2018 Conference
Jan König – @einkoenig – from Jovo – https://www.twitch.tv/videos/292701309
Huy Nguyen – @hueezer – from Chef Steps – https://www.twitch.tv/videos/292713945
Nick Schwab – @NickSchwab – from Invoked Apps – https://www.twitch.tv/videos/292769886
Paul Cutsinger – @PaulCutsinger from Amazon
Tahsim Ahmed – @tahsimdotcom – https://www.twitch.tv/videos/292769935
Steve Tingiris – @dabblelab – from Dabble Lab – https://www.twitch.tv/videos/293619669
Chris Geison – @chrisgeison – Answer Lab
Tim Kahle & Dominick Meissner – from 169Labs
John Kelvie @jpkbst – from Bespoken
Floriant Hollandt – @FloriantHollandt
Bradley Metrock – @VoiceFirstFM
Brandon Caplin @SkilledCreative – from Skilled Creative – https://www.twitch.tv/videos/293623219
Tom Edwards – @BlackFin360 – https://www.twitch.tv/videos/293619423
Bahubali Shete – @KloveChef – from Klove Chef – https://www.twitch.tv/videos/293619371
Rebecca Evanhoe – @Revanhoe – from Mobiquity Inc – https://www.twitch.tv/videos/293619594
Dustin Coates – @DCoates – from Algolia – https://www.twitch.tv/videos/293619467
Justina Nguyen – @JustinaEats – from DashBot.io – https://www.twitch.tv/videos/293189985
Adva Levin – @PretzelVoice – from Pretzel Labs – https://www.twitch.tv/videos/293190048
Designing Voice Apps
Memo Doring and Paul Cutsinger discuss Designing Voice Skills for Alexa
Episode # 1 – https://www.twitch.tv/videos/297267982
Office Hours
Get your Questions Answered Live – Tuesdays @1:00 PM PST
August 14, 2018 – https://www.twitch.tv/videos/297340571
August 21, 2018 – https://www.twitch.tv/videos/300194218
Alexa Skills using the Python SDK
Memo Doring shows how to create Alexa Skills using the Python SDK
Episode # 1 – https://www.twitch.tv/videos/297661415
Episode # 2 – https://www.twitch.tv/videos/298494514
Episode # 3 – https://www.twitch.tv/videos/298524195
Tips & Tricks
Various Alexa Personalities discuss Tips & Tricks for Alexa Skill Creation
Certification Tips – https://www.twitch.tv/videos/297618433
Recipe for creating a top rated Alexa Skill – https://www.twitch.tv/videos/298462469