Watch the video.
CNN fact checked Obama's video and here is what they concluded:
The Statement: The campaign for Democratic presidential nominee Sen. Barack Obama on Monday, Oct. 6, unveiled a Web site noting that Republican opponent Sen. John McCain played a key role in the Senate's "Keating Five" scandal of the 1980s. "McCain intervened on behalf of Charles Keating with federal regulators tasked with preventing banking fraud, and championed legislation to delay regulation of the savings and loan industry — actions that allowed Keating to continue his fraud at an incredible cost to taxpayers," the site says.Read the complete analysis of McCain's actions on behalf of Charles Keating here.
The Verdict: True. McCain did push to delay regulations that would have cracked down on savings-and-loans practices and intervened on Keating's behalf, although he was cleared of wrongdoing in the "Keating Five" case.