The best part of the video is watching the crash/rescue crews playing with the foam sprays
They're just waving them around in some cases, trying not to knock the passengers off of the exit slides and stairs. Right at the end, one just shoots almost straight up, just splattering foam on everyone in the vicinity but not doing anything else really. They firefighters probably get to shoot the foam maybe 1-2 times a year, so they sure didn't waste this chance
They probably will charge the airline for the cost of all the foam too, so why not use it.