ANN: Python training "text movies"

[rusi]

On Jan 13, 12:08 pm, Mitya Sirenef <msire... at lightbird.net> wrote:
> Sure: they play back a list of instructions on use of string methods and
> list comprehensions along with demonstration in a mock-up of the
> interpreter with a different display effect for commands typed into (and
> printed out by) the interpeter. The speed can be changed and the
> playback can be paused.

Hi Mitya.
What do you use for making these 'text-movies'?
[Asking after some googling]