How to access locked files without the phone?

I found an old blackberry phone in the attic, it's completely busted but the micro SD card survived and I could open it on my PC! It has a few photos which was fun to find but it also has 4 videos, but they are all .3GP.LOCK files and I cannot open them.

I've seen online that you would load them up on the phone and unlock them that way but that's not an option for me, is there a way to unlock them on the pc? Maybe a program like a file converter?

If this is not an option then would the micro SD card open ok on a different blackberry phone or would it detect the SD was from a different phone and not open the videos?

Thank you for your time.

I think those files are encrypted. The decryption keys would have been in the OS on that original phone. Sticking the card in another phone or PC won't help. Still need the decryption key that was in the associated OS that locked it in the first place.

Otherwise, what's the point of encrypting the files if the card can just be taken out and read on another device.

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Its DOA the card is married to the phone.