I Didn't want to believe it at first. Take a close look at Mcgregor's punches.
The first tell was the uppercut on 30 seconds in the video. To me it looks like that was a perfect KO setup, if only he put some strength behind it.
Second Tell for is at 2:17 in the video. Mcgregor throws his signature left but doesn't use force again. In my eyes this could have been a potential KO if he put some strength behind it. Looking closer you can see his glove slow down on the last moment.
There are moments like this all throughout the fight. 2:41 another left with no force. If you have watched any Mcgregor fight, you can probably see this is not the normal Mcgregor.
2:47 intentionally gets hit. The newspaper shot looks like it.
3:02 That bodyshot.
I'll stop for now. If you see any more tells, post m in the comments please. Maybe we can blow this motherfucker up.