I currently can't comment or reply to comments on youtube including my own channel, tried two browsers and the app. Been like this for a couple of days. @TeamYouTube is this a known issue?
Thanks for reaching out. There are no related technical issues, we recommend sending a feedback report directly from your YouTube account with these steps: http://yt.be/help/RYwc . While you may not get a direct response, we do review the details to investigate and fix issues.