Video of Stromboli volcano activity on August 2 2011 (Italy) has picked the below video because it shows Whenever you plan a visit to Sicily and the Etna, please change your plans and include at least 4 days Aeolian Islands in it.
The steep walk from the base of the Stromboli to the summit area will be one hard as a lot of the walking occurs in loose ash, but it can be done easily by every fit walker.
When you arrive at the summit there is a good chance that you will see what this video is showing. On top of the astonishing views, the  heat radiated by the explosions is an additional emotion you will always remember. Make sure that you have your flashlight with you so that you can descend to the sea level after dark.
The end of the video shows what you will probably be witnessing in the dark evening hours. The tour can be made guided or on your own. If you stay to the trails and follow instructions the risk is minimal.
I climbed the volcano myself, walked down after dark and had one of the greatest experiences of my life. Enjoy the video!
PS. If you are considering visiting Stromboli and making a walk to the active vents, please read the comments below. They might be interesting for you. If you have made the walk yourself, let us know your opinion via de comment form below.

Stromboli information
Spectacular incandescent nighttime explosions at Stromboli volcano have long attracted visitors to the "Lighthouse of the Mediterranean."
Stromboli, the NE-most of the Aeolian Islands, has lent its name to the frequent mild explosive activity that has characterized its eruptions throughout much of historical time.
The small, 924-m-high island of Stromboli is the emergent summit of a volcano that grew in two main eruptive cycles, the last of which formed the western portion of the island.
The Neostromboli eruptive period from about 13,000 to 5000 years ago was followed by formation of the modern Stromboli edifice.

The active summit vents are located at the head of the Sciara del Fuoco, a prominent horseshoe-shaped scarp formed about 5000 years ago as a result of the most recent of a series of slope failures that extend to below sea level. The modern volcano has been constructed within this scarp, which funnels pyroclastic ejecta and lava flows to the NW.

Essentially continuous mild strombolian explosions, sometimes accompanied by lava flows, have been recorded at Stromboli for more than a millennium. (Stromboli information courtesy Smithsonian Institution)