Yes, this is excellent...I wish I could be there for the screening!
It's funny, it seems LFL is a little more lax on conventions in Europe. I did a presentation on the Holiday Special at Jedi-Con 2004 in Germany, officially approved by LFL for this official LFL event. Yet, when I tried to propose the same, updated panel for Celebration 4 in L.A. a couple years later there was much hemming and hawing before they finally told me it had been denied. We also were also unable to officially get any Deleted Scenes footage shown at C4 during the panel with the Deleted Scenes actors (which was remedied by unofficially showing MoveAlong's "Behind the Magic" preservation DVD!). I feel like the same might have happened if you'd proposed to show the restored Parbot documentary at a Celebration in the States - here, it seems to be more about toeing the party line.
Of course with Disney in the picture now, it's hard to say how things might change...for better or for worse?