When you search for live versions of Abba songs on Youtube, you often end up with a recorded version that is being mimed along to. I thought it might be useful to have a thread directing people to proper live versions. For some songs there doesn't seem to be any live versions at all online (e.g. One of Us) but I guess that's mainly for the later stuff. Here's a nice version of Knowing Me, Knowing You from the Dick Cavett show.
I'm trying to find a live version of The Winner Takes It All online but there doesn't seem to be one. Here's a TV performance where they've brought along a full band, but it's clearly just the recorded version.
Neither One of Us nor The Winner Takes It All were ever performed live by ABBA, either in concert or on TV, so that’s the reason you can’t find them. The only versions that exist of them are the familiar studio-recorded ones.