Need help finding the source of noise interference

[BilboFett]

Attached pics and vid are ANY connection, either VHS or LD input!.
You can still see the interference w/ the TBC, its not pure black. there's movement.
I changed cap cards, and from desktop to laptop, and changed outlets to a different room.
Its still the same.
If its BOTH the VHS player and the Laserdisc player, and ANY cap card.. its not those devices, its the house, imo?
I just need to know WHAT in the house is causing it.
I relocated to a different room, everything off (lights, utils, etc.), using a different laptop, and cap card.
Same interference.
I'm concerned its a whole-house ground loop or bad wiring or something.
Any ideas? Anyone recognize this pattern?


[Attachment 82312 - Click to enlarge]
[Attachment 82313 - Click to enlarge]
[Attachment 82314 - Click to enlarge]

Vid is w/ TBC on. You can still see movement, interference.