How do you you record while playing Minecraft?

Answer 1

It depends what application you use to record PC gaming or console gaming (whatever version you play)

For the computer I use Quicktime for Mac as it records gameplay and live commentary at the same time.

For console I use a Hauppauge HD PVR to record XBOX footage in 1080p HD but no commentary.

There are other forms of recording, which are freeware and shareware.