There's an In-Game-Timer, and I think, a screenshot of your time is enough, isn't it? I would change it. WR doesn't need a Video proof too. (in my opinion)

Mario & Sonic at the London 2012 Olympic Games (3DS)

Why video proof for IL's?

Pikachu_X_Ruby

Mario Kart 7

Super Mario Land 2: 6 Golden Coins

New Super Mario Bros. 2

Super Mario 3D Land

The Legend of Zelda: The Minish Cap

Fairune

The Legend of Zelda: Ocarina of Time 3D

Refunct

The Legend of Zelda: Tri Force Heroes

Mario Kart 8 Deluxe

New Super Mario Bros. U Deluxe

Yooka-Laylee and the Impossible Lair

Super Mario 3D World + Bowser's Fury

Super Mario 3D World + Bowser's Fury Category Extensions

Super Mario Bros. Wonder

The leaderboard is under an embargo period for 2 weeks after release. This is to allow players to enjoy the full experience of the game casually without feeling like they have to rush into developing the speedrun right away. Please take your time and enjoy the game!

The Legend of Zelda: Echoes of Wisdom

Super Mario Party Jamboree

BossMode