You can go find the linked video[0] which long pre-dates any advertisement around it.

In fact, the video is 14 years old and doesn't have anyone[1] from the law firm that linked to it in the video.

[0] https://www.youtube.com/watch?v=d-7o9xYp7eE

[1] https://en.wikipedia.org/wiki/James_Joseph_Duane

Regardless, what they say here is genuinely true and it's worth knowing things like "police are allowed to lie to you". Some people find that sort of thing surprising.