The transcoding of new uploaded videos is not working correctly . The resulting message is "Added to Job queue [INVALID] ago" and a manual reset produces no changes. For examples see https://commons.wikimedia.org/wiki/User:Atlasowa/New_video2commons/2016_December_11-20
This is known, and being worked. It's simply that the backlog became extremely large due to a high number of 'huge' (1920P, and an hour long) and a (resolved) bug that caused the servers to try to start an insane number of concurrent tasks. More transcoders have been added to the cluster, and the backlog should fall over time. Transcodes marked as "Added to Job queue [INVALID] ago" are indeed being run, there are just 10k tasks in the queue.
They are not 1920p (that would be impossible to transcode for a hour long video), most are 720p, which is still large. Well, atleast the White House don't make their hour-long videos 1080p nor 1920p...
@Pokefan95 When I said 1920P, https://commons.wikimedia.org/wiki/File:Moscow_Ring_Railway_full_trip_-_view_from_ES2G_train.webm is actually the one I was thinking of... which yes, is not actually 1920P (which is not a real thing), but it is a 2.5GB full-HD video... I was vaguely making the point of 'insanely large files' in a very generic manner.