Update
12:56 PM PT -- More video has emerged from the incident involving Jason Kelce ... with the new angle showing the person whose phone Kelce smashed demanding it back.
A scuffle ensues, broken up by people standing near Kelce ... before he appears to yell back at the man "Who is the f***** now?" -- seemingly referencing the comment that was screamed at him earlier.
We reached out to Kelce and ESPN about this new clip.