Does anybody know much aobut Adobe: Adobe Reader on Linux has support for Flash and media playback up to version 9.4.1. It was dropped thereafter. The built-in Flash player of AR-9.4.1 supports Flash content up to Flash version 9. However, the media players shipping with media9 require Flash Player 10.
player_flv_maxi.swf is Flash Player 9 compatible and can be used with media9 and AR-9.4.1 on Linux. Its FlashVars for configuration are documented here. The most important FlashVar is the one for setting the video source. Here it is called flv=....