Well... since Google completely messed up video comments on YouTube with the recent 'populist' changes it's now become increasingly difficult to hold a question/answer conversation whenever someone ask something of one of the
video tutorials posted to KatsBits channel. With that in mind
a new section has been added to the forum that solves this problem by posting each tutorial video to it's own topic to which you can now comment if you have questions about anything you see in the videos; this is the only way to 'thread' replies as YouTube don't appear to be interested in returning comments to their previous format.
Guest posting is on (and moderated) in that section but it's recommended you create an account as guests have limited features.