App Version: 51.0.2704.43 beta (Testflight version)
iOS Version: 9.2.1
Device: iPhone6 plus
URL: youtube.com

Precondition: Have Youtube app installed and sign in with any test account.

Steps to reproduce:
  1. Launch Google Chrome
  2. Sign into Chrome 
  3. Open a new tab and goto youtube.com
  4. Tap on Subscriptions tab
  5. Tap on the circular icons that takes you to the channel page
  6. Once the info bar shows up tap on "Just Once" 

Observed results: Youtube is launched trying to load the channel and quickly redirected to Chrome again and shows an error page.

Expected results:  App shouldn't be redirecting to Chrome app again.

Note: Youtube GAL settings is turned OFF in Settings.
Based on the video, https://www.youtube.com/UCF0pVplsI8R5kcAqgtoRqoA?noapp=1 is the URL to which Chrome app is redirected finally and showing an error page.

Number of times you were able to reproduce: 5/5
Bug reproducible after clean install: Yes
Bug reproducible after clearing cache and cookies: Yes
Bug reproducible on Chrome Mobile on Android: NA
Bug reproducible on Safari/Firefox: Firefox: NA, Safari: NA
Bug reproducible on current stable build (App Version, iOS Version): M50.0.2661.95 YES
Bug reproducible on the current beta channel build (App Version, iOS Version): M51.0.2704.43 YES

Link to video/image: https://drive.google.com/a/google.com/file/d/0B-xmXLQhjeKubmFxTHdrcDVQMDg/view

Please let me know if you need any other information.