You are correct that guy is confused. LED TV is a term made up by big tv companies markting. It is used for ANY tv that uses led’s to illuminate the screen instead of the old energy wasting lightbulbs.
There are different ways that the led’s can light the screen, the best of which is local dimming meaning that the leds are located right behind the screen so only the parts of the screen that are needed to be “on” have the leds light up. Even though it provides superior picture quality this method is less common becuase the tvs have to be thicker to accommodate the leds behind the screen. The other most popular way to light a screen is have the leds to the side of the screen and then essentially pipe the light to the areas of the screen where it is needed. That guys doesn’t realize that every single tv that has leds in it is refered to as an LED tv thanks to samsung who really made a huge marketing push for it. To more specifically answer your question no, no tv’s are made of only leds an no lcd on top.
I repeat ANY and ALL tvs that use leds to light the screen are refered to as “LED TVs” by the marketing people of the large electronics companies, and MOST tvs today are edge lit since it lets the tvs be sigfnicantly thinner.