youtube – Why is this video’s duration 466 hours?

This video, while being in reality 13 minutes long, started being displayed with duration 466:16:28 in all other contexts, like in playlists, recommended etc. Why is that?

Thumbnail showing 466:16:28

Using the API, the duration is reported as P19DT10H16M28S, corresponding to the duration shown on thumbnails. What could be the source of this value?