Glitchy loading world

Glitch when loading or create a world

I hope my world either load normally.
Je pensais que mon monde se serait charger normalement, sans bugs graphiques.

I don't see 3/4 of the blocks.
My world loaded slowy because I was recording, and when the world finished to be created, a HUGE glitchs happens.

Steps to Reproduce the Glitch:
1. Create a world

I've put the video in the attachments, he's named: "2016-02-29_184629855.mp4" and my MineCraft log.