Beautiful work! You certainly need to be dedicated to catch those with the eruptions being so infrequent and random. I saw it at night '95 from pretty close by I can still hear those lava bombs crashing only 500m distant.
Is this your own Arenal video? if so, I would like to know what camera you used, what location you recorded the explosions from, and what time of year was it? I wanna see Arenal myself. I might also be interested in posting the link to this video on my volcano website if I can get the name of the owner and where he's from.
Really really nice! Been at Arenal in 2004; could only see lava blocks, red spots in the night; and clouds, and rain, and fog, never seen the summit! How lucky you are: no fog and beautiful strombolian explosions.