After a tumultuous week for tech stocks on the Nasdaq, Yahoo! is jumping into the streaming entertainment game with numerous original series, expected to be backed by a big budget from Marissa Mayer. And Google is debuting a set-top box of its own, as it hopes to compete with Amazon's Fire TV. Plus, Nasdaq leaders Tesla, Facebook, Netflix and Yelp look to rebound from a down week on the market. And Jim Cramer weighs in with a technology stock of his own.