Hey everyone! Thanks for your input. I was able to apply Amignon's fix for all of my video file scenes, and it worked superbly! All of my videos were on auto play and not in the actual director. So, boom. Fixed.
As for my fullscreen templates, the fix would've been more complicated. So, I ended up exporting a still from the monitor, and placing it up for only one frame on the "in" Set that as my preview frame, and that did the trick. A goofy solution, but all my scene previews are looking/working great now.
Thank you both again!
#XPression