No, the only way to derive the assumption that the video is Superman/Big Barda pornography is by taking that scene out of context. Context is key. That story is a two-parter that began in Action Comics #592 (1987) "...A Walk on the Darkside!" where a thief stole Big Barda's purse, which had Barda's Mega-Rod in it, the thief runs down to Metropolis' Suicide Slum sewer where he is captured by Sleez's Ash-Crawler from Apokolips, and Sleez blasts Big Barda with the Mega-Rod, knocking her out. When Big Barda awakens she becomes controlled by Sleez's mind control power and he makes her dance wearing tassels and heavy make up.
Then we learn the origin of Sleez. He use to be Darkseid's henchman on Apokolips until he fell from favor and Darkseid banished Sleez to Earth, where he's lived in the sewers of Metropolis' Suicide Slum.
Meanwhile, Superman's x-ray vision detects traces of a peculiar radiation all through the area of Metropolis known as Suicide Slum, which is the same radiation he detected in elderly citizens from that area, which is keeping them alive at a Metropolis health clinic for low income people. Investigating for the source of the radiation sends Superman down to the sewer where he encounters Big Barda and Sleez. Superman's sudden entrance breaks Sleez's mind control over Big Barda, giving her the chance to obtain her Mega-Rod, she attempts to blast Sleez, but Superman's x-ray vision detects the radiation he'd been searching for is coming from Sleez, so he tries to prevent Big Barda from blasting and killing Sleez. Big Barda then assumes Superman is a pawn of Sleez and blasts Superman with the Mega-Rod, knocking Superman out. Then Sleez's Ash-Crawler from Apokolips snatches Big Barda's Mega-Rod and Sleez opens a trap door sending both Big Barda and unconscious Superman down. In Action Comics #593 (1987) "The Suicide Snare" Darkseid is at Mister Miracle's house and gives him the video tape of Big Barda (presumably dancing wearing just tassels and heavy make up), filmed by Sleez in the sewer.
Then Grossman, who has seen, produced and distributed the video of Big Barda, and is introduced to Superman (under Sleez's mind control) and Sleez (thinly disguised as "Mister Smith") purposes the idea of filming a video of Superman with Big Barda.
But they are resistant to Sleez's mind control. Earlier Sleez commented that Big Barda's strength of will is great. Sleez also comments on Superman's strong moral fibre making him resistant to Sleez's power. All they do is hug and kiss.
Mister Miracle finds Sleez and Grossman's set, and is surprised to see Superman there with Big Barda, and he worries that it's about to go too far as Big Barda and Superman hug and kiss, and he crashes in through the window.
Mister Miracle's sudden entrance breaks Sleez's mind control. Big Barda fights and kills Sleez's Ash-Crawler from Apokolips...Superman flies after Sleez, who has escaped into the sewer amongst the lead pipes, until Superman finds him, and Sleez then seems to kill himself by lighting a match which ignited the gases from the decomposing sewage. The blast blew off all the manhole covers all over Suicide Slum. Then Superman, as Clark Kent, goes back to the health clinic, assuming that if Sleez is dead, so are the elderly patients that Sleez's bodily radiation was inadvertently keeping alive. But Clark Kent discovers to his surprise that they are still alive and the radiation that his x-ray vision detected in their bodies is still there, still keeping them alive. But he had discovered that the radiation came from Sleez. Sleez feed on human misery and the destruction of the human spirit, but he also inadvertently gave off the excess energy as pure life force. That life force is what's keeping those elderly people alive, and if they're still alive...than so is Sleez.