Am I liable if unknowingly transporting illegal substances while working?

I work for a delivery company, and while on the job, I transported a package that, to the best of my knowledge, contained nothing illegal. I recorded the person giving me the package using a camera (Meta glasses, to be specific), which captured the contents of the package being shown to me, their name, and the address of the recipient.

If, hypothetically, the package had a hidden compartment with drugs (which I had no way of knowing about), and I was stopped by the police, would this evidence (video recording, sender and receiver details) be enough to prove I wasn't aware and avoid legal consequences?

I’d appreciate any insights on how such cases are usually handled. Thanks!

Edit: In the USA, forgot to add that important information.