In the video above, the viewer can clearly see large flames in the background. This was from a VBIED, according to the title of the video. The Institute for the Study of War has made a map of Baghdad detailing where these attacks took place. Multiple mortar attacks took place in Kadhimiyah, which also saw two VBIED's, with one of them being a SVBIED. The latter attack was reportedly on a key bridge that linked Kadhimiyah and Abhamiyah districts.
It is also being reported that the IS has assaulted the former Camp Justice, which was a former joint Iraqi-American base in Baghdad. Camp Justice was the site where Saddam Hussein was hung and it housed a detention center.
The most interesting aspect of this entire ordeal is how IS was able to launch this coordinated of an assault despite intense security in Baghdad. This ultimately shows their reach into the heart of Iraq. While it's not like what they have done in Syria or northern Iraq, this is still significant as IS has repeatedly shown that they can still strike in the most heavily defended city in Iraq. Now, they have shown that they can launch a well coordinated assault. This could be just the first of many.
This article will be updated as new information becomes available.