I have no idea exactly what cocomelon is like, but just from googling around it seems like the video equivalent of a playground where everything is padded and it's almost impossible to hurt oneself in the smallest way. There is no mischief in the thing. No kids getting into things they shouldn't. No adventure. No danger. No thinking. No agency. Just antiseptic, ostensibly "educational", 100% wholesome content.

Of course, it also seems to be for much younger children than something like Rugrats, so maybe that's where this reaction of mine is coming from.