This is the 532nd most frequent Turkish word.
insanları
"People" or "humans" (accusative case).
Here, 'insanları' refers to a specific group of people who were mentioned earlier in the conversation or text.
Bahsedilen insanları henüz tanımıyorum.
I do not know the mentioned people yet.
'İnsanları' in this sentence is used to refer to people in general, emphasizing the broad aspect of human nature.
İnsanları anlamak bazen zordur.
Understanding people is sometimes difficult.
In this context, 'insanları' specifies the audience or participants at the festival who were entertained.