finished watching the video, pretty entertaining.
i have no problem with people invoking their rights per the miranda warning.
but keep in mind, should you choose to invoke, and the only statements police have are those given by a victim/witness, an arrest will almost certainly be made.
the speaker asks an officer in the audience how many times a suspect ever convinced him of innocence/non-involvement, and the officer chose not to arrest. the officer answered "none".
my experience has been different. there have been times when i have arrived at a call to find a victim/wit who claims a person committed a crime. following an interview with the "suspect", some of those acts have been accidental (no criminal intent), wrong person, or some other mitigating circumstance.
this is not legal advice, just my experiences and opinion.