Like already been said, VLC Media Player can flip the image. Same goes for KM Player, but since VLC is an allround great player to have, I'd go with that. I'm a leftie myself, and I'd swap all my stuff over to rightie-ways anyday if I could. Even if you're left handed normally and just start out, I suggest you try to learn card-stuff as a right-handed person, you'll be glad you did.
I got a pet peeve for the fact that my normal fans are blank, peeks don't work out the way they should and that moves generally are adjusted for right-handed people. I guess being a leftie comes with a few privilegies such as a more natural-looking Losing Control and a few other things, but I think the negative side weighs the most on the scale. There are alternative moves meant for lefties, but they just feel like those ramps meant for wheelchairs to me personally.
But just like Stein, I use to imagine myself as being a mirror-image of the right-handed person.