These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Bughuul & the kids he possesses live in videos of the families being murdered. Depending on how that works, it's possible that the families get murdered all over again every time someone watches the movies.
The tapes that wind up in Elliot's attic both times. If Bughuul's servants still exist on the physical plane, this means they're likely the ones actually physically leaving them. While the supernatural factor is scary enough, the idea that there are people physically breaking into your house is...unsettling.
More Fridge Tragedy than anything, but if Elliot had thought to delete the files before moving back into his old house, he likely wouldn't have been killed.
Narm: The whole thing with Bughuul's children making a shush gesture after EVERY FRICKIN' REEL on the "extended cut endings" gets old and cheesy after the first time, especially with the little Kubrick Stare they all give.
Bughuul looks a bit like either a member of Slipknot or the Ultimate Crack Smoking Warlock.
The ghost kids frolicking around Ellison gets a lot less scary with each kid.