Antonio Brown gave all of his Facebook friends and followers a rare glimpse behind-the-scenes on Sunday night when he started broadcasting on Facebook Live less than 10 minutes after the Steelers beat the Chiefs 18-16 to advance to the AFC Championship Game against the Patriots. And something tells us his head coach Mike Tomlin is not going to like what Brown showed the world when he did it.

Shortly after the Steelers/Chiefs game in Kansas City ended, Brown popped up on Facebook Live from inside the Pittsburgh locker room and started broadcasting his teammates celebrating their win. The video lasted for about 17 minutes and was eventually viewed by more than a million people before it was removed from Facebook. And while most of the broadcast was little more than various players hooting and hollering, things took a turn towards the end when Tomlin entered the locker room to address his team.

During his fiery post-game speech, Tomlin talked about how the Patriots got a 24-hour jump on the Steelers by winning their game against the Texans on Saturday, while the Steelers had to wait all the way until Sunday night to play the Chiefs due to inclement weather. It seems he’s upset with that but is still going to do whatever it takes to get his team prepared to play New England.

"When you get to this point in the journey, man, not a lot needs to be said," Tomlin told his players. "Let’s say very little moving forward. Let’s start our preparations. We just spotted these assholes a day and a half. They played yesterday. Our game got moved to tonight. We’re going to touch down at 4 o’clock in the fucking morning. So be it. We’ll be ready for their asses. But you ain’t got to tell them we’re coming."

Oddly enough, Tomlin also told his team to "keep a low profile" during his speech, which was pretty much the exact opposite of what Brown was doing by broadcasting Tomlin’s words on Facebook Live. "Let’s get ready to ball like this up again here in a few days and be right back at it," Tomlin said. "That’s our story."

As ESPN noted, several of Brown’s teammates could be heard saying things like "keep cool on social media" and "keep your mouth shut, and let’s play Steeler football" during Tomlin’s speech.

Brown hasn’t responded to any of the controversy his Facebook Live video has caused yet, outside of removing the video from Facebook. But Tom Brady talked about it on Monday during his weekly appearance on the Kirk & Callahan radio show on WEEI. "I don't think that would go over well with our coach," Brady said when he was asked how Bill Belichick would respond to a player broadcasting one of his post-game speeches on Facebook Live.

You can check out Brown's now-deleted Facebook Live video, courtesy of TMZ Sports, above.