The video appears in the subscription list as expected, yet it's not watermarked with the "WATCHED" word, and the yellow bar of watching completion is not shown.
At first, I thought maybe it was reaploaded, but I just let it run again, out of curiosity, and it still appears as not watched in my YouTube subscriptions page.
Is this a bug?
The video is from the SmarterEveryDay channel
"The Gun Detector - Smarter Every Day 225"