I think it was Sherrod Brown, not Tom Perez, in the infamous video you hard thinking of.
Actually, after research it was Antonio Villaraigosa, DNC chair at the 2012 convention. Knew it was a hispanic.
“The original 2012 party platform caused controversy after it was written, because the typical invocations and references to God and God-given rights were omitted, and language affirming the role of Jerusalem as the capital of Israel was removed. On Wednesday, September 5, former Ohio Governor Ted Strickland introduced an amendment on the floor of the convention to reinsert language invoking God and recognizing Jerusalem as Israel’s capital. Convention chairman Antonio Villaraigosa put the amendment to a voice vote requiring a two-thirds majority for passage. After the first vote was indecisive, Villaraigosa called for a second vote, which was again met with an equal volume of “ayes” and “nos”. A woman standing to his left said, “You’ve got to rule, and then you’ve got to let them do what they’re gonna do.” Villaraigosa called a third vote with the same result. Villaraigosa then declared the amendment passed, causing an eruption of boos on the floor.”