I think the player might assume the video is VR when using the DeoVR API (XBVR uses this). You should be able to manually change the projection format, though. Just switch to "Perspective" projection, which is for flat videos. You also might need to change the stereo mode.
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Thanks for the comment, all sorted here. I was trying to adjust the screen by changing the projection value to perspective That changed the window to a bordered frame but kept the VR aspect to the 2D video. not sure if this may be a bug or not, no combo of settings seemed to change that, but using the Format option to apply the Perspective default, did render the video properly Thanks again!