Those filter capacitors can indeed allow the "ground" on a double-insulated TV/VCR to sit at mid-line potential unless an external ground is applied elsewhere in the system.
Once you have two or three such pieces of equipment tied together, each with its own filter capacitors contributing, you can feel quite a tingle when brushing the shell of the RF or A/V jacks, especially while holding the shell of a coax plug which is grounded, as is often the case.
With our 240V supplies, putting a high-impedance meter on the TV/VCR "ground" will often result in a reading of over 100V.
