My YT account has a total of five personally-recorded videos (from the era where smartphone cameras still sucked) with no music in the background and no monetisation on any of them.
One of the videos was hit with an automated DMCA takedown, one was hit with a "mature content" takedown, and the remaining 3 have ads on them now.
One of the videos was hit with an automated DMCA takedown, one was hit with a "mature content" takedown, and the remaining 3 have ads on them now.