Originally Bitchute used Disqus to provide discussion forums on the videos that people would upload. Back then Disqus had only a few simple rules: Just enough to comply with the law. They left actual moderation at the discretion of individual site owners. Disqus allowed members to embed images and Youtube videos in our comments. We could enable notifications when someone replied to us and we could follow other users that would often lead me to discover other site of similar interest. I found Disqus to be a good means for free exchange of ideas and intelligent debate with a rich multi media experience and lack of platform interference or biased agenda.
Alas imature cyber trolls started abusing fake identities to harass others "just for the lulz", to post spam, pornography, slander and incitement. Bitchute was either not able, or not willing to do all the moderation while their channel owners were not offered the facility. Eventually Disqus imposed draconian moderation filters on their Bitchute forums. They also disabled uploading of images.
Bitchute switched to their own proto-type commenting platform. That has much more limited capabilities. Besides absence of embeded images or videos, one gets no notifications.
There is no link to particpant's channel, or comment history and so the Bitchute video discussion forums as they are now are not much use.
In fact they are a liability to channel owners who will need to go back and check for posts on each and every one of their uploads.