This question already has an answer here:
I wish to see the comments on videos I've made. When I go to the comments section on YouTube it only shows me comments made on my videos (and I believe it only shows the ones made after the change to Google+). It does not actually show comments that I've posted. How can I see a full history of all the comments I've made on YouTube?
I found this post but sadly it is outdated and does not work with the Google+ system.