If PlanOut is deterministic, why I see different result from the tech talk video

[xinallume]

I am using python 3.6.8 with planout-0.6.0. In my local box I ran the following block:

class SignupExperiment(SimpleExperiment):
  def assign(self, params, cookieid):
    params.button_color = UniformChoice(
      choices=["#ff0000", "#00ff00"],
      unit=cookieid)
    params.button_text = UniformChoice(
      choices=["Join now", "Sign me up!"],
      unit=cookieid) 
e = SignupExperiment(cookieid=4)
print(e.get('button_text'))
print(e.get('button_color'))

which give me:

Sign me up!
#ff0000

However, the video (https://www.youtube.com/watch?v=Ayd4sqPH2DE) shows

Sign me up!
#00ff00

This made me worried that whether I should trust deterministic claim and not logging user bucket during experiment. Any insights?