Alphabet, Inc. (NASDAQ:GOOGL) (NASDAQ:GOOG) reported second-quarter earnings and revenue that exceeded expectations but some key metrics trailed, including YouTube ad revenue, came to light. Management comments on the margin trajectory also did not augur well with investors, sending the stock down in after-hours trading. Munster’s Key Earnings Takeaways: Deepwater Asset Management’s Gene Munster noted that Search business revenue climbed 14% year-over-year, the same rate as in the first quarter, and Cloud revenue growth accelerated slightly from 28% to 29%. YouTube ad revenue climbed 13% but a…