American Horror Stories
Season 1: Rubber(wo)Man Part Two (Hulu; IMDb; Wikia) This streamed in July.
Animaniacs
2020: Episode 11 (Hulu; IMDb; TV Tropes; Wikia) This streamed in November.
At Home with Olaf
2020: Pumpkin (YouTube)
Christy's Kitchen Throwback
2019: Mummy Cake Pops with 1ST EVER DCOM Actor/Magician (IMDb; YouTube)
2019: Halloweentown Witches Brew With Kimberly J. Brown!!! (IMDb; YouTube)
DC Kids Show
2017: DC Super Hero Costumes! (YouTube)
2017: Trapped Inside a Haunted House Toy Set!! (YouTube)
2017: 8 Halloween Hacks! (YouTube)
2019: Trying Super Hero Halloween Costumes (YouTube)
2019: Halloween Party Challenges! (YouTube)
2020: DIY Batman Pumpkin Painting! (YouTube)
2020: DIY Haunted Houses! (YouTube)
2020: Halloween Party with Special Guests! (YouTube)
Deadbeat
Season 1: Raising the Dead (Hulu; IMDb)
The Flog
Season 1: Felicia & Ryon Play Zombies Ate My Neighbors
Gotham Girls
Season 1: Trick or Trick? (DCAU Wiki; IMDb; TV Tropes)
Grumpy Princess Show
2016: Halloween with Grumpy Princess (YouTube)
The Guild
Extra: Halloween Special
Into the Dark
Season 1: The Body (Hulu; iHorror; IMDb; Wikipedia)
Season 2: Uncanny Annie (Hulu; IMDb)
Just Add Magic
Season 2: Just Add Halloween (Amazon; IMDb; Wikia)
Kids Try
2015: Kids Try "Grown Up" Chocolate (YouTube)
Life Hacks for Kids
2015: Minion and Lego Costume Hacks (YouTube)
2015: TMNT and Donut Costume Hacks (YouTube)
2016: Last Minute Costume Hacks for You and Your Dog! (YouTube)
2016: Halloween Candy Leftover Hacks (YouTube)
2017: Halloween Party Hacks! (YouTube)
2017: Last Minute Costume Hacks! (YouTube)
2018: Pumpkin Putt Putt Game (YouTube) This is more fall than Halloween, but all the hacks feel sort of Halloweenish.
2018: Hackable Halloween Decor (YouTube)
2018: Fluffy Gummy Bear Slime & More Leftover Candy Hacks (YouTube)
Mina Murray's Journal
Season 1: Halloween Greeting (YouTube)
People Vs. Food
2017: Guess That Halloween Candy Challenge! (IMDb; YouTube)
2019: Trying Celebrity Favorite Candy (YouTube)
React
2022: Hot Or Not? Best Halloween Costumes (YouTube)
2023: Halloween Treats & Spooks Mystery Box Of Terror Challenge (YouTube)
SciShow Kids
2023: A Halloween Candy That Comes From Bones and Bugs! (YouTube)
Stranger Things
Season 2: Trick or Treat, Freak (A.V. Club; Dread Central; Halloween Specials Wiki; IMDb; TV Tropes; Wikia)
Teens React
2022: Do Teens Know These Iconic Horror Movies? (YouTube)
Underlined
2019: 3 DIY Halloween Costume Ideas from Team Underlined (YouTube)
WandaVision
Season 1: All-New Halloween Spooktacular! (A.V. Club; IMDb; MCU Wiki; TV Tropes; Wikipedia) This streamed in February
What They Got Right
2018: Jack Skellington Couldn't Walk?! (IMDb; YouTube)
Written by a Kid
Season 1: The Zombie Spider