Amazon's $8.5 billion bet on MGM is the latest sign that tech is transforming Hollywood. Here are the biggest deals that have altered the streaming world.

The media business keeps consolidating, and Amazon's purchase of MGM Holdings isn't the first sign. Disney bought 21st Century Fox in 2019, gaining control of Hulu, and AT&T is merging WarnerMedia with Discovery. The deals signal a trend that many in the media world realize survival lies in the streaming...