Harmonic's second-quarter revenue and earnings were better than expected, and investors took notice.Shares of video-streaming technology company Harmonic (HLIT 17.15%) skyrocketed today after the company reported better-than-expected second-quarter results.Revenue and earnings surpassed Wall Street's expectations, leading to investors rushing in to buy the stock. Harmonic's shares were up by 20.1% as of 11:32 a.m. ET.Falling revenue and earnings, but ahead of estimatesHarmonic generated revenue of $138.7 mi ...