Minecraft 1.12 Update Videos ► https://www.youtube.com/playlist?list=PL7VmhWGNRxKixIX8tWEQn-BnYKE9AaAXk
Snapshot 17w43a is the first from minecraft 1.13, a technical update dealing with the backend of the game.

https://www.reddit.com/r/Minecraft/comments/78o7kf/minecraft_snapshot_17w43a/

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Other series on my channel
Hermitcraft V Playlist ► http://xisuma.co/hermitcraft5
Foolcraft Playlist ► http://xisuma.co/fool
Minecraft Tutorials Playlist ► http://xisuma.co/tutorials
Minecraft 1.12 Update Playlist ► http://xisuma.co/updates
Do You Know Minecraft? Playlist ► http://xisuma.co/doyouknow
Minecraft Myth Busting Playlist ► http://xisuma.co/mythbusting
Minecraft Showcase Playlist ► http://xisuma.co/showcase