Streaming content is content that is available solely over the Internet and not available over linear sources, such as broadcast or cable TV.
I think.
(The line between broadcast, linear, and streaming continually blurs in that a lot of broadcast and linear content is watched over the Internet via "streaming" network providers, such as YouTube TV, yet it remains broadcast, for example, because it's available over the air. Similarly, "streaming content" like ESPN+ can be found as a part of streaming content providers , such as Hulu live.)