Not sure how long ago this started happening, but FLVs loaded on my server a year ago, which have been playing fine since, have stopped playing.
The JW Player comes up with my logo, but clicking on the play button does nothing. Videos uploaded to YouTube are playing fine through WordTube.
I've double-checked the FLVs and I can download them and play them on my machine.
I've got the latest version of WordTube - 2.2.2. Haven't found any answers on the JW Player site.
[This post lists my WP version as 2.8.5., but I'm on 2.8.6 - not sure why it did that, because when I started the post the drop down menu showed 2.8.6 so I left it like that...]