Because he is using Blender's "Cycles" rendering system and has no idea how to handle it.
I only started using it, I wasn't sure how to change it.
This thread reminds me of Blockeye Entertainment. :c
I wish they put out more content...
I tried to animate a few things but I never managed to make an animation that didn't look stuff.
Here's some food props, they were made by someone who wasn't me and I just used a BLS2OBJ converter to get it in blender.

Regular Blender Render.