i think we won't know until you try.
if it works OK and no freezing, then it was a media problem.
if not, then probably something is wrong with the files (bad authoring?) and you need to re-author.
One Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them
In the land of Mordor, where the Shadows lie
M.C. Escher - Reptilien