The Carmelo Anthony clip has gone around the internet by now, but, interestingly, MSG Network’s postgame show was the first to show it Monday night.

The video, leading off the program after the Knicks’ 115-103 loss to the Magic, shows Anthony dribbling the ball on the deep left wing and clearing out his mates, essentially calling his own number. Coach Jeff Hornacek, standing along the sideline close to midcourt, whipped around, turned his back and marched angrily back to the bench.

It’s unclear whether Hornacek turned around in time to see Anthony launch another brick over Orlando stud Aaron Gordon on the way to a 6-of-17 shooting night.

There is a possibility Hornacek wasn’t annoyed at Anthony as much as at the original play breaking down, with Kyle O’Quinn apparently failing to set a pick. It’s also uncertain if Anthony was waving off O’Quinn or waving for him to set the pick.

Hornacek played dumb, saying he can’t remember the specific play in question, but acknowledged coaches can get too frustrated when a certain set isn’t run textbook.

“I don’t know what was going on on that play,’’ Hornacek said. “These guys, they’re supposed to call plays.”

Hornacek said he did get frustrated “a couple of times’’ on blown plays.

“Overall, sometimes as coaches we’re too hard on the guys,’’ Hornacek said. “We expect perfection all the time. If we have a set we have and don’t run it exactly right, you get frustrated. We can’t do that. Players are going to make decisions. It’s not always the X’s and O’s on how it’s run.’’

The MSG telecast, reputed for putting a positive spin on bad situations, didn’t hold back in screening video of an array of Anthony’s defensive breakdowns, showing him out of position and not rotating correctly in the team defensive schemes against the Magic, who shot 15-of-31 on 3-pointers.

The MSG crew could have been emboldened by Hornacek’s remark in the postgame press conference that maybe the Knicks “are not capable’’ of playing good defense.

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While Anthony losing a step on defense has been well-documented, his shooting percentage has dipped to 42 percent. That is the second-lowest percentage of any player in the top 50 in the NBA in scoring. Phoenix’s Devin Booker is the lowest at 40.2 percent.

Anthony, who is ranked 22nd in scoring at 21.8 points, played on a sore left knee the previous two games, but his shooting slump can be traced back 10 games, in which he is at 38 percent (61-of-157).

In training camp, Hornacek talked about Anthony’s shooting percentage, saying he wanted to see it rise to the 45-46 percent range by being more effective on shots around the rim. Anthony shot 43.4 percent last season.

“I think being banged up is probably part of it,” Hornacek said. “As a shooter or scorer, sometimes you go through four- or five-game stretches where you’re making some and you’re missing some. I’m sure with Carmelo, he’ll all of a sudden be hot and be 12-for-17.’’

True to form, Anthony expressed little worry after the Knicks’ loss to Orlando and did not make himself available after Tuesday’s practice.

“I just missed them,’’ Anthony said Monday. “I got to get some more arc on the shot. I don’t know. I just have to keep shooting it and working it. Not too concerned with that.”

Bucks coach Jason Kidd, who played with Anthony with the Knicks during the Knicks’ glorious 54-win season in 2012-13, said the superstar forward is still as scary as ever.

“He’s Melo,’’ Kidd said before facing the Knicks on Wednesday. “He’s dangerous. He’s a guy who can put the ball in the basket — inside and outside. When you look at what he’s doing with the pounding he takes, hits he takes, he never shies away from contact. He just keeps playing – just as dangerous as when I was a teammate of his.”