Here's SM's video releases:
>Feb 26, 2016 - Sun & Moon Announced
>May 10- Starters Revealed
>June 2 - Legendary Info & Explore the Alola Region
June 4 - The Incineroar, Decidueye & Primarina pages get posted on /vp/
>June 14 - Pikipek, Yungoos, Grubbin, Battle Royal
>July 1 - Tapu Koko, Charjabug, Vikavolt, Drampa, Bruxish, Cutiefly, Togedemaru
>July 7 - Salandit
July 8 - Chinese text leak with a bunch of info
>July 19 - Wimpod, Bounsweet, Comfey, Mudsdale, Mimikyu, Bewear, Hyper Training
>August 1 - Alolan Forms announced, A Exeggutor, A Vulpix, A Ninetails, Oricorio, Minior, Gumshoos, Fomantis, Lurantis, Mudbray, Riding on Pokemon, The Island Challenge, Trials, Mallow, Lana, Kiawe, Totem Pokemon, Hala, Z-Moves
>August 11 - Wishiwashi, Pyukumuku, Morelull, Team Skull, Plumeria, Guzma, A Meaoth, A Marowak, A Raichu
>August 19 - 2016 Pokemon World Championship Trailer - Crabrawler, Sandygast, Palossand, Stufful
>September 1 - A Rattata, Pokemon Specific Z-Moves, Munchlax Giveaway with Snorlax -Move
>September 6 - Type: Null, Jangmo-o, A Raticat, Version Differences, Aether Foundation, Lusamine, Faba, Wicke, Gladion, Zygarde Cells, Poke Finder, Ultra Beasts, UB-01 (Nihilego)
>September 14 - UB-02 (Buzzwole), UB-03 (Pheromosa)
>September 20 - Version Exclusives, Passimian, Oranguru, Lycanroc, Character Customization, Pokemon Refresh, Pikachu Z-Move, Eevee Z-Move
>October 4 - Dartrix, Torracat, Brionne, Festival Plaza, Poke Pelago, Mega Evolution, Demo Version with Special Greninja October 18
>October 14 - Silvally, Hakamo-o, Kommo-o, Steenee, Tsareena, Ribombee, A Grimer, A Muk, Olivia, Ilima
October 17 - Demo datamine found all the box sprites in the game
>October 27 - Decidueye, Incineroar, Primarina, Tapu Lele, Tapu Bulu, Tapu Fini, Tapu Z-Move, Cosmog, A Persian, Battle Tree, Red & Blue Fight
November 8 - Whole game leaked and datamined
>November 14 - Starter Z-Moves, UB-03 (Xurkitree), UB-05 (Guzzlord), A Diglett, A Dugtrio
>November 18 - Sun & Moon Released