Last Wednesday, a brand-new volcano sprouted from the ground in the Rekjanes peninsula in south west Iceland. The following video shows the exact moment when magma, rising in a dyke, breached the surface and red-hot lava came issuing forth. To have video of this moment is both rare and special.
The eruption is ongoing. You can follow its progress in real time (weather and smoke permitting) on the web cams available here:
If you wish to dig deeper into the underground machinations of this and other volcanoes, I can highly recommend Volcano Cafe. It is run by academics with reasoned commentary plus very readable in-depth articles on this and other eruptions.