I doubt a handheld camera is going to play these ancient reels. They are not in cassette form, but actual reels with tape that is degrading over the years. One of the reels is about 10" diameter compiled of many smaller tapes from back in the day.

So far I have been able to set up the digital camera and record them, but you end up with the 'flutter' from frame speeds not matching. They never will since the tape speed is varying all the time and using a mechanical motor to move the tape. It's better than nothing and has preserved a couple tapes that ran for their last time as I recorded them. One of them has a guy walking in the background with an ice pick and a block of ice, heading to the house.. I'm guessing some of these are 60 - 70 year old tapes.

Make your sound your own!
.. I do not work here, but the benefits are still awesome