Have you opted-in to receive all notifications for that channel? Here's a troubleshooter to help you check the settings: https://goo.gl/giVA8o . Also, mind sharing the URL of the video you did not see the option to comment? Keep us posted.
Can you file a feedback report w/ screenshots and any other details: https://goo.gl/WdI0BK ? Thanks!
-
This Tweet is unavailable.
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.