OT - kid videos/tv shows

veggietales. 

Handy Manny is a reliable classic.  

Numberblocks

Storybots (all the versions)

Bill Nye (though I assume some modern shows are similar)

PBS programming is solid across the board

As others have mentioned, Bluey is very good.

Howdytoons music cartoons on YouTube have more interesting music than most young child-targeted programming and are also somewhat educational.

youtube also has a ton of full episodes from the Land Before Time tv series, which my kid loves. She also loves Animaniacs and The Adventures of Sonic the Hedgehog.

Just remember that anything commercially produced is intended to get your kid to get you to buy them stuff. 

Our son loves Mickey Mouse Clubhouse.

Bluey seems to be the new hotness now, and my kids really liked Daniel Tiger, Xavier Riddle, Paw Patrol, etc.  Mostly stuff on PBS Kids.  Also, my kids liked some cartoon movies like Ponyo and Kiki's Delivery Service, just for the visual elements.  But at the same time, let kids enjoy some dumb stuff.  I think most people consumed a bunch of dumb, low-quality media in our days and it didn't destroy anyone's soul.  And honestly, this place is full of people obsessed to varying degrees about college sports, and that obsession came about likely when we were exposed to the sport at a young age (probably not 3, but who knows).  

Keep your kid away from YouTube, as others have said. My kid is hooked on it and it’s almost entirely trash aside from Miss Rachel. 

Music: Super Simple Songs have some classic songs with pretty neat visuals to go along with them. 

Shows: Bluey, Mash & The Bear, and Curious George. All very fun and not loud and stupid. 

Learning? Sparkabilities

ABSOLUTELY NEVER PUT THESE ON: Ms. Rachel or Blippi

Mr. Rogers

you can go back into some of the better stuff from Sesame Street and Mr Rogers and also I'd highly recommend The Magic Schoolbus - though he might need to be a little older.  Backyardigans was also recent and not bad

I applaud your vigilance.

Robocop, starring MGoBlog's own Clarence Boddicker. It's never too early for kids to be exposed to ultra-violent critiques of American society.

Super simple songs. I hate Blippi, the kids like him. Helper cars. I also loathe Coco Melon but my daughter likes it.

Invader Zim when your child is a little bit older.  It was the only kid show I could watch with my kids and not be bored out of my skull.

I'm in grandkid mode now, but I definitely concur with the Bluey and Daniel Tiger comments.  Both perfectly pleasant shows, easy to watch for everyone and not a ton of screen time.  

Must second the Bluey suggestion