This text appears to be a standard file name for a television episode. Specifically, it refers to:
The "X..." typically precedes a video codec like XviD or x264 , which indicates how the video was compressed. Beowulf.Return.to.the.Shieldlands.S01E05.HDTV.X...
In this specific episode, the plot follows Beowulf as he travels to the Mere to build an alliance with the Chancellor, only to find himself caught in a web of secrets and a brewing conflict between tribes. This text appears to be a standard file