A little girl has a dolphin encounter.
Canadian backpacker meets Iraqi elderly man who shows him around.
https://www.youtube.com/watch?v=wxXz55dEgHg
SNL ‘Jeopardy’ with Will Ferrell. 
Terd Ferguson and Sean Connery!
A few years ago, watching a school teache (A. Maceo Smith New Tech) leading students to ‘Uptown Funk’.
Snowball the Dancing Cockatoo (including a Tribute to Michael Jackson). Some people studied him and said he was actually dancing to the beat on his own, not just copying his owner’s moves.
Any number of dance compilations to one song - Rita Hayworth, or Fred Astaire, or clips from black and white sit-coms. And Christopher Walken. Very uplifting.
My favorite number in Guys and Dolls. I can never listen to it just once.
Nora the Piano Cat (RIP), given her full due with an orchestral composition.
(Spoiler) They re-align to their beginning formation at the end
I’m not much of one for content genres, per se, so here are just some specific examples that make me smile.
Boy In Tiger Costume Plays With Tiger Cub At The Zoo - video Dailymotion
This video never fails to make me smile and laugh and I can’t even tell you why but I love it and have had it bookmarked for like ten years.
You win!!
Dat’so funky!
This is cute …