Because it shows how McAuliffe runs elections in Virginia. He's the one trying to rubber-stamp the restoration of voting rights to as many felons he can - despite a court order saying he can't do it in mass.
McAuliffe is also the one who arranged giving half a million to the politician wife of the FBI official involved in the Clinton email probe. An FBI official who was then promoted from running the Washington field office to Comey’s Deputy Director, the 2nd highest position in the agency - all in 1 year.
Not arguing the importance, obviously.
But the title of the thread indicated that this video was of events currently happening in Texas.