All of our titles are available in the NTSC standard used in North America, among other places. They are not region coded, so they should play in any DVD player. Unless the DVD player is multi-standard (becoming increasingly affordable), it will output an NTSC signal, so the TV/monitor to which it is connected must be capable of displaying an NTSC signal. Most TVs sold in Europe in the last few years are NTSC-capable.
Most of our DVDs are recorded on DVD-Rs. These may not play properly on older (pre-1999) DVD players. If you have purchased DVD-Rs from another source and they play properly for you, then ours probably will as well. If there is any doubt in your mind, request our free catalog, which comes with a DVD-R containing our complete catalog, browsable using your DVD player (no computer necessary), as well as some sample scenes. If this plays, then any DVD you order from us should play.