Adobe has released a beta of their Adobe Media Player. This media player is aimed at helping you consume, and find, online video. The app requires the AIR runtime, though the install is painless.
Adobe is touting this as a lightweight, cross platform video player. The transitions are choppy, the response time is laggy, and as such the application is useless. Let's hope this gets cleared up before this app leaves beta .
You can download a copy of the beta from Adobe Labs, and it is free.