I watch the History Channel often. Many of the programs are clearly left leaning. Hit the MUTE button & enjoy the video.
The HC knows they are lying, but many viewers don’t, so it is propaganda for the ignorant.
History Channel pissed me off when they spent an entire Memorial Day weekend running and re-running John McCain, True American Hero (and a couple of other documentaries about him) a few years ago. McCain was catching a lot of hell from conservatives, so the History Channel took revenge on their conservative viewers by plastering his ugly mug on TV nearly 24/7 over a Memorial Day weekend.