This meeting almost certainly took place in the summer of 1912 in the great campaign which climaxed with Ulster Day. Carson would have been filmed had he been there and the lack of UVF contingents indicated a pre-January 1913 event. Banners of Unionist Clubs show that this was an all-Tyrone demonstration with signs from South Tyrone, Augher, Clogher, Ballygawley, Castlederg, Killeter and Bready. 

It's unclear where Pathé got the figure of 300,000 considering Ulster's population was 1.5 million. The images in this film certainly do not reflect that estimate.