I noticed something changed on my YouTube account a couple of months ago. It’s a new “Checks” feature, and it seems to have now rolled out on a wider scale. Essentially it’s a new step YouTube takes immediately after you upload your videos to check for any obvious monetisation or copyright issues.
It’s likely the same checks they’ve always done, except they’ve taken the status report from behind the scenes to right in front of the user during the upload process. It happens within a few minutes and means that you can publish your content sooner without waiting for unknown wait times for copyright and monetisation checks.