It's down, not up.
http://www.cleveland19.com/story/33652810/early-voting-numbers-down-in-cuyahoga-county

Early voting is over and Cuyahoga is down according to the board of election.

What's his track record?

He is wrong on Cuyahoga, I think he might be confusing it with some other county or comparing some wrong numbers.
Board of election released the numbers and Cuyahoga is down in both mail and in person early vote.

"Early voting was down across the board in Cuyahoga County. Early in-person voting was down about 16 percent countywide compared to 2012 and about 14 percent fewer ballots were mailed in. In total, 218,711 early votes were cast, down from 253,512 at the same point in 2012."

http://www.cleveland.com/politics/index.ssf/2016/11/ohio_early_voting_up_slightly.html

You can either believe some guy tweeting or Cuyahoga county board of elections. If they managed to pull such huge numbers on Sunday from their single polling location, why isn't county board of elections reporting it?

Maybe check it out before you go negative. He sounds like he's there in the field.

compared to 2012. Seems if anybody should know how many people voted it would be a director of the board of elections?

Non-stop canvass and phone calls.

Hope this rings true and I will be able to say I was part of it!