How can I record insane action in Minecraft?

I used to make videos which had a lot of system-intensive gameplay, for example, 10,000 TNT exploding at the same time.

I used to have a modification that slowed the game down and recorded it frame by frame. I haven't used it since 1.2.5 and so unfortunately can't remember what it was called.

Video Example

I have a project which I want to result in a large explosion, and I will be using about 50,000 TNT. I have a better computer than I had then, but with shaders I would be hard pressed to find anyone that could pull it off. How could I record something like this?

I have attempted it without any special settings or modifications, and my Minecraft installation just crashes.

My current system specification is:

  • Nvidia GTX 660 Ti
  • 16 GB Corsair RAM
  • Quad-core 3.8 GHz processor.
  • 250 GB SSD and three 2 TB hard disk drives

The mod you're talking about is the Minema mod although, as far as I can tell, it's only compatible up to Minecraft 1.6.

It works at least up to 1.7.2 with this version.

A good rundown of Minema, as well as a few others, is given in this Yogscast video: