Yeah, civil forfeiture is theft. There are some small town police departments that happen to be along some major interstate that specialize in civil forfeiture. Just like the cop in the above video, they pull people over for minor traffic infractions but they are not traffic enforcement and they are not there to write speeding tickets. They are "interdiction" officers and there entire job is to fight the drug war. The drug war is the war America has waged against itself for more than 50 years now. As one could likely predict, America is losing the war, on both sides.
If that man had trusted the police as much as he trusted banks he never would have lost his money (he got it back). There is never a reason to disclose sensitive information to the police when they pull you over. They are not entitled to the information and they will more likely than not use any information you give them against you rather than for you.
Police have a prosecutorial mind. That means that they are always looking for lies and guilt. They see everything through the lens of discovering the crime that must be occurring. You can support the police 100% but that doesn't mean you should answer all their questions or consent to their searches.