First I would look at source-code/API of their site, example of Coco Nogales = 2017-03-26, but is clearly wrong (also that date on IMDB btw), considering you can find that video also from 12 June 2014.
Peaking: Carson Storch -- Behind The Scenes At Red Bull Rampage / 2017 / Virgin, Utah
Peaking: 72 Hours With
Peaking: Joyride -- 72 Hours With Nicholi Rogatkin / 2017 / Whistler, British Columbia Peaking: LAAX Open -- 72 Hours With Mark McMorris / 2017 / Laax, Switzerland Peaking: UCI MTB World Cup -- 72 Hours With Jenny Rissveds / 2017 / Lenzerheide, Switzerland Peaking: Knockout -- 72 Hours With Marc de Reuver / 2016 / The Hague, Netherlands Peaking: Red Bull Straight Rhythm -- 72 Hours With James Stewart / 2016 / Pomona, California Peaking: Rampage -- 72 Hours With Kelly McGarry / 2015 / Zion National Park, Utah
Peaking: A Big Wave Surfer's Perspective
Peaking: Ian Walsh -- A Big Wave Surfer's Perspective / 2015 / Miyazaki + Tokyo, Japan Peaking: Mark Mathews -- A Big Wave Surfer's Perspective / 2015 / Sydney, Australia Peaking: Coco Nogales -- A Big Wave Surfer's Perspective / 2014 / Puerto Escondido, Mexico Peaking: Peter Mel -- A Big Wave Surfer's Perspective / 2014 / Half Moon Bay, California Peaking: Ramon Navarro -- A Big Wave Surfer's Perspective / 2013 / Pichilemu, Chile Peaking: Carlos Burle -- A Big Wave Surfer's Perspective / 2013 / Teahupo'o, Tahiti Peaking: Jamie Sterling -- A Big Wave Surfer's Perspective / 2013 / Half Moon Bay, California
You can find some kind of news article for some episodes on their site and at youtube:
2013-03-27 - Jamie Sterling - https://www.redbull.com/se-en/peaking-jamie-sterling (Mar 29, 2013 - https://www.youtube.com/watch?v=zXfRUMKaH5c) - "Peaking - A Big Wave Surfer's Perspective is a new, six-part original series" 2013-06-26 - Carlos Burle - https://www.redbull.com/se-en/peaking-carlos-burle (Jul 2, 2013 - https://www.youtube.com/watch?v=T4bQA3PXov4) - "is the second episode of the series" 2013-10-01 - Ramon Navarro - https://www.redbull.com/us-en/peaking-ramon-navarro (Sep 25, 2013 - https://www.youtube.com/watch?v=-Eu5vT7qUSs) 2014-04-09 - Peter Mel - https://www.redbull.com/se-en/peaking-peter-mel-big-wave-surfers-perspective (May 1, 2014 - https://www.youtube.com/watch?v=yYYO-IJYlEM) 2014-06-12 - Coco Nogales - https://www.redbull.com/se-en/videos/peaking-coco-nogales-2014-6-12 (May 12, 2015 - https://www.youtube.com/watch?v=moRVsgg5Yu8) etc.
Most times the site article is first, but sometimes (like Ramon Navarro) it's first on YT. Therefor I am not sure if you want to use this.