I was shown this site a while back and just found the link for it again. A few brave volcanologists managed to get close enough to the vent of Eyjafjallajökull during the eruption in 2010 to take these amazing videos, below is an example but more can be found at http://www.mrietze.com/iceland10-2.htm. There are also some brilliant photos as well. Check it out!
I am currently studying volcanology in the UK and want to share this interest with others.