Per my comment on the ESPN forum post (the latest one…) NFL.com has Shazier highlights. In fact, it has its own compilation of Shazier highlights. 

http://www.nfl.com/gamecenter/2014081603/2014/PRE2/bills@steelers#menu=gameinfo%7CcontentId%3A0ap3000000379187&tab=videos

Scroll down just a little bit on the page and its there. Click and enjoy.