I was attempting to watch 'The Time Machine' (original from the 60s) the other night via a Sumsung UHD Player UBD-M7500 and experienced several hard freezes that were repeatable. The easiest to find was a litt e after the one hour mark when Rod Taylor exits the sanctuary building and goes down the steps. It would always freeze there.

My solution was to switch over to Chromecast and watch it that way which experienced no freezes. The web player on Chrome also works fine.

So it seems the bud is specifically with the UBD-M7500 (and/or the Samsung Vudu app) .