So basically I watched a lot of videos that featured like the POTG animation of Overwatch characters and I was "what if TF2 had this?". It's literally a taunt in a shellnut. (Rip ALL Wallets if this is implemented) Here are some potential POTGs that I could think of.
Feel free to post your ideas in the comments.

Scout
Default- The animation that is shown on the class select scene.
"Play Ball"- Camera shows Scout holding the Sandman and a baseball. The camera zooms out as he tosses it up and swings. The camera then gets hit with the baseball and cracks the lens. Scout shouts "Oh that's a dinger!" as the ball connects.
"Hit-n-Run"- A distant "Fwoosh!" can be heard in the background followed by a "BONK!" and the camera falls to the ground as if something hit it from behind. Scout then picks it up and yells "I. Am. Owning you!" into it.
Soldier
Default- The animation that is shown on the class select scene.
"The Eagle Has Landed"- Several explosions happen on the ground before Soldier lands there in a crouched position. He stands up straight and salutes.
"Screaming Eagles!" Soldier rocket jumps towards the camera and switches to a Market Gardener mid-flight. He lets out a war cry as he smacks the camera, which goes black as the 'crit' sound is made.
Pyro
Default- The animation that is shown on the class select scene.
"Friends Forever"- Pyro dances around with a Balloonicorn in his/her/its arms before striking a pose with the plush above his/her/its head.
"Execution"- Pyro holds up the Scorch Shot and fires at an off-screen target. The camera backs up and follows the flare.
Demoman
Default- The animation that is shown on the class select scene.
"Totally Out"- A Bottle rolls into frame and the camera zooms out and reveals a ed out Demoman surrounded by several (possibly empty) Bottles.
"Thousand Year Reign"- Demoman swings around the Eyelander as his eye glows green. He then holds the sword up as eldritch lightning flashes across the screen. As he holds it up, Demo says, "I know everything! I feel everything!".
Heavy
Default- The animation that is shown on the class select scene.
"Cry Some More!"-Heavy walks up to the screen shooting his Minigun while saying "WAAAAH! WAAAAH! CRY SOME MORE!". The camera slowly pans up to his face, which shows a large smile. (Similar to the ending part of Meet the Heavy).
"Sandvitch?"- Heavy begins to eat the Sandvitch but notices the camera and offers the viewers the Sandvitch, while asking "Sandvitch?".
Engineer
Default- The animation that is shown on the class select scene.
"Gunslinger"- Engineer wipes out his Pistol and fires off several rounds into the camera's lens before twirling it and blowing the smoke away, all while saying "The hand is quicker than the Eye!".
"Sentry Jump"- Engineer, with Wrangler in hand, flies off using a Sentry's rockets, while shouting 'YEEEEEEEEEHHHHHHAAAAA!"
Medic
Default- The animation that is shown on the class select scene.
"Needles"- Medic produces a needle from behind him and grabs the camera. He says, "Do not vorry, I vill heal you!"
"Archimedes, No!" Medic is examining a heart when Archimedes swoops in and takes it. Medic then runs after the dove, "Archimedes!".
Sniper
Default- The animation that is shown on the class select scene.
(If Huntsman equipped) "Fruit Shoot"- Sniper draws his bow back and lets an arrow fly, the camera follows the arrow as it pierces an apple.
"Jarate"- Sniper produces a jar of Jarate and throws it, "Heads up!", and makes the entire scene yellow.
"Boom, Headshot"- A red (or blue) dot is seen moving around before it focuses on the camera. The camera then goes black as a sniper shot is heard.
Spy
Default- The animation that is shown on the class select scene.
"Surprise!"- The camera focuses on a cardboard box. It then is turned around revealing Spy with his Knife held high.
"I am Here"- The camera shows a empty screen, but then Spy fades into existence and blows a puff of smoke.
Comments (2)
In Competetive:
M A Y B E . . .
In Casual:
Heck no.
Honestly I think the sandvitch one is the greatest thing ever