GrannyMary. Sure, I'll put the Magic Loop techniques up. It might be a little while, though, because I have to find someone to borrow circular needles from! (I have a set of interchangeable circular needles, but their cables are too thick to demonstrate ML1).
If anyone has a spare pair of circular needles of the same size, and wants to send them to me, I'll send them right back! I'd be grateful not to have to buy a set just for the demo!...
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Mara, there actually is a demo of left handed knitting on this site! It's hiding on the purl page, of all places. I'm not sure if it's the true left handed knitting, because I think that true left handed knitting may wrap the yarn the other way, and end up with the stitches oriented on the needle in the reverse way. If you want to really knit left handed, I would recommend taking a mirror, and holding it up to all of the videos on this site! Look in the mirror, and it will show you exactly what to do! Even on the decrease and increase stitches! (Just remember that your "left slanted" increases and decreases will slant to the right, and vice versa.)
I know I've got you all excited about using the mirror, but I'll mention this anyway. You may want to consider Continental Knitting, where you hold the yarn in your left hand. Yes, you will be putting the right needle into the left needle's loop. If you want, you can always put the left needle's loop "onto" the right needle. It seems to me that this could be done. I've heard that lefties often knit continentally, so it must work out somehow! Anyway, I'd recommend trying it, since with this method you would be able to follow all knitting directions easily, without having to reverse them. Most knitting instructions are given on paper, without a handy video, and reversing paper instructions would be a bit of a drag!
....But
of course, you should do whatever is exciting and feels right to you!!

Let me know what you end up doing! I'm curious to hear what works for you!
Happy knitting!
Amy