Do people do this exercise outside of videos? I feel like bodybuilders do it for the camera because they can put so much weight nd make themselves look strong, but stick to machines with lower weight when the camera is off.
Glass had Flex doing it---of course that was back in 93, Ronnie Coleman did them---and I think most of the Texas Crew---it's a taxing, yet fun movement...hence why many of today's bbers don't it
How is t-bar more "free weight" than smith? Think about it. 
If that's what you meant?
Well, the old skool way---and the way I perform them in HS, was take a barbell, remove weight off one end and put the end in a corner. Have a T-bar or handle attachment at the end with the weight. So, it's essentially a free weight movement...