Depending on the options and gameplay selected, the cinematic option can have some wonkiness. You can try adjusting the cinematic options so the camera does less abruptly twists and turns, or try going to "Global Editor -> Character Rotation Options" and disabling "Allow Airborne Side Switch".

I'll see if I can make this option more stable on the next update.

(I meant to post this here, not in the topic 3D camera problems. whoops....)

So I almost found a way to make the cinematic camera work in 3d (Source 2.5.1). Here's what I did so far:

1. In the Move Editor tab - Animation: I clicked the preview tab the prefab animation for the intro.
2. In the Hierarchy tab: I created a new camera
3. In the Animation tab: I created the animation for the camera (Position, Rotation, and Scale) Afterwards I saved the Animation File, closed the animation preview, and deleted the new camera.
4. In the Inspector tab: I switched from Normal to Debug and changed the animation file to Legacy.
5. Back to the Move Editor tab - Cinematic Options:
-I changed the Cinematic Type to Animation
-Set the Opponent's Animation Speed to 0
-Set the Animation Speed to 1, and
-Kept the Blend Speed to 100.
6: I clicked the Camera Preview and adjusted the Field of Blend to the setting I wanted for the camera (In my case it was 35)

The only part that I am having trouble with was that when I hit play, the animation moves the way I want it to, but the camera is facing the back of the character.

I'll be back when I can figure out how to set the camera to face the front of the character. Hopefully these steps will get everyone closer to what you want the 3d cinematic camera to do.

Until next time.

Update:

I just remade the camera and made it face the front of the character prefab in Move Editor.

Hope this helps.

I have yet to review the cinematic options for 3D gameplay. I think the best way to achieve this is to make your own custom camera animation and use the prefab option.