It's a forum game but...

[Power Flotzo]

...Sakana ka Nandaka? plays, but every time the word "sakana" is said, it is replaced by...

 

[The Owl Trio]

...Sakana ka Nandaka? plays, but every time the word "sakana" is said, it is replaced by...

Wario shaking his butt for 12 hours but everytime Wario scratches his butt...

 

[Waluigi Time]

...the entire Bee Movie plays but whenever Jerry Seinfeld is on screen...

 

[The Owl Trio]

...the entire Bee Movie plays but whenever Jerry Seinfeld is on screen...

A giant hyper realistic skeleton pops out of your screen, but everytime it does...

 

[Wynn Liaw]

...it becomes Steve fighting off skeletons, but everytime Steve picks up a bone...

 

[The Owl Trio]

Every episode of The Muppet Show plays but every time Kermit is on screen...

 

[Wynn Liaw]

...it becomes a gameplay of Water Land from Super Mario Bros. 3, but every time Mario enters a body of water...

 

[The Owl Trio]

...it becomes a gameplay of Water Land from Super Mario Bros. 3, but every time Mario enters a body of water...

Every episode of SpongeBob Squarepants plays backwards, but every time the color yellow is onscreen...

 

[Wynn Liaw]

...this animation plays, but every time a Pokémon appears on screen...

 

[Waluigi Time]

...the entire video reverses itself until...

 

[Venture]

...it ends, and a Scott the Woz video plays, but when he says "Hey all, Scott here!" ...

 

[Wynn Liaw]

...a video of a person driving in Scotland plays, but every time the person stops at a traffic light...

 

[The Owl Trio]

All Star plays but everytime he says All Star...

 

[Wynn Liaw]

...a gameplay of Super Mario All-Stars plays, but every time a game is chosen...

 

[The Owl Trio]

Every episode of Family Guy plays but anytime Peter farts...

 

[Wynn Liaw]

...a gameplay of the Sound Effects level from Super Mario Maker plays, but every time Mario kills a Shoe Goomba...

 

[The Owl Trio]

Every Five Nights at Freddy's jumpscare plays but every time Foxy's jumpscare plays...

 

[Wynn Liaw]

...a gameplay of Star Fox plays, but every time an explosion cloud forms...

 

[The Owl Trio]

Mr. Blue Sky plays but everytime he says cloud...

 

[Wynn Liaw]

...a video clip of clouds moving in the sky plays, but every time a gray cloud appears...

 

[The Owl Trio]

Cloud's reveal trailer plays but everytime someone who's not Cloud is onscreen...

 

[Kirbyo]

The Minecraft Steve trailer plays.

 

[Flowey]

But every time someone vocalizes the entire Eminem discography plays but every time he curses...

 

[The Owl Trio]

A clip from Barney and Friends plays but everytime Barney is onscreen...

 

[Wynn Liaw]

...a video of a bunny plays but every time it hops...