Zoom Video Communications Inc. (Nasdaq: ZM) gave a sales forecast that fell short of some analysts’ estimates, raising concerns the company will have difficulty maintaining rapid revenue growth as workers turn away from remote meetings. Shares fell more than 16% at $289,50. Revenue will be about $1.02 billion in the current period, and $4.01 billion in the fiscal year. Analysts had expected quarterly revenue of as much as $1.06 billion and annual sales of as much as $4.08 billion, according to data compiled by Bloomberg.