Hi John,
I suspect it's just tape, there's no evidence of screws into the plastic pedestal of the TV from above. The shelf the TV sits on is likely about .5" and has a closet on one side and cabinet on the other. There is a trim piece on the front of that shelf and a very thin veneer panel on the underside to give the impression that the shelf is more substantial than it actually is.
The plastic TV pedestals are generally like a shell on the under with nothing to screw into which is why I suspect dbl sided tape has been used on the 'feet' of the pedestal.
An example of the Bedroom Samsung TV can be seen in this listing...not my coach
https://ventura.craigslist.org/rvs/4807862926.html