If you are a CEO, you have to rehearse the delivery for something like this. Even more now that these videos are certain to become public. To me, this video says that he's a mediocre leader. If I were on the board I would seek to replace him.
Yup. This video has a "Oh hey, didn't see you come in. Welcome to my personal cafeteria. Since I have you here, just wanted to let you know you're fired" vibe.
At least don't do it so disrespectful. He talks about his feelings but he seems mildly awkward and a bit bored at best, seems like all the preparation he put into this is to remember a few talking points. Makes me think laying off 900 people took him a grand total of 90 minutes (from decision to announcement).
I don't know anything about the company, but looks like one going down to me. Very few companies can get away with treating people like that at a large scale.