> We may terminate your channel or account for repeated violations of the Community Guidelines or Terms of Service. We may also terminate your channel or account after a single case of severe abuse, or when the channel is dedicated to a policy violation.

And for their purposes your posts include linked content. You have a channel that only posts videos that the algorithm likely flags as hacking instructions, and you've linked to a site that very likely has been flagged by the algorithm multiple times. The recent change in the YT terms of service likely coincides with a minor patch to YT's moderation algorithm which pushed your videos over the detection threshold.