replacement for adobe flash player

There isn't one.

Streaming HTML5 web services, which many former Adobe Flash serving sites have now switched too. Otherwise, none.

Flash is dead. There is no "replacement".

What in the world are you using that still requires flash?

When I bought a new iMac about two years ago I chose not to install Flash, Silverlight, or any other third-party player. So far every video or animation I've used has played perfectly without them.