This is something I would be open to doing, but don't know where to start. Can you point those of us who aren't familiar in the right direction?
Well, first you need a video camera, a cell phone that can record video, or a webcam. Basically, some way that you can capture the video data for use.
You'll probably need some way to transfer the video file from your camera or phone to the hard drive of your computer. There's plenty of phones, and actually a few videocameras that can connect to the internet (through the whole 2/3/4G networks, or through a local wifi), and upload directly to youtube, but chances are you're going to want to be able to edit the video somewhat (for example to cut out the few seconds where you're getting back around to the front of the camera after reaching over to push the 'record' button). Probably the easiest way is by using a USB cable, which is supported by the vast majority of modern devices. I personally use memory cards, because I can store archives of B-roll and previously used footage on them, and label them, but if all you're going to film is a 'I'm a gun owner' thing, you won't need to do that.
You'll need some kind of software to compile the video, and convert it to the proper format to upload onto youtube. Thankfully this software is easily available as free downloads, and Windows Movie Maker, which might have come with your PC (if it didn't, it's free to download) can do it. If any of the high-tech sounding words I've used sound intimidating, relax, it's all pretty easy, and pretty intuitive as long as you're not trying to add in fancy special effects.
The content of the video, is up to you. At it's most basic, I would say all you need is to put yourself in front of the camera and talk about yourself a little.
First part: 'Hi, I'm (insert name, screen name, CB radio handle, whatever you're willing to be identified by).'
Second part: Tell some things about yourself... hobbies (gun related or not), your job, your family, favorite food, how much you like your car, anything you want to include or exclude, it's up to you.
Third part: Talk about why you own guns, what the freedom to own guns means to you, and what place they have in your life. Do you hunt? Do you shoot competition? Are you a CCW holder? Again, include or exclude whatever you feel like, since this video is about you as an individual.
Last part: 'I am <repeat whatever name or username you prefer to be identified as>, and I am a gun owner.'
At the MOST basic, you could actually film yourself sitting in front of the camera, and do all of this in a single take, there's nothing wrong with that at all. Or you could do multiple takes, do one take per part, and then edit it together later. This is PERFECTLY acceptable, I won't refuse to post it.
At a more advanced level (like what I am going to do in January), is to insert what is called B-roll footage over the sound of your voice. This is actually kind of difficult to do in windows movie maker, so if you don't already know how to do it, I would RECOMMEND just making a basic video (if you're REALLY determined to do it, PM me and I'll try to help).
So, for example, what I'm planning to do is, I'll have filmed some footage of myself at the company office in El Paso, some footage of me at the range, some footage of me playing video games, and other things like playing pool.
And then, when I film myself in front of the camera talking about myself, when I talk about my job, I'll insert the footage of myself at the office, with my voice-over continuing. Then when I talk about my hobbies, I'll insert the footage of myself playing video games, and playing pool. And when I talk about why I own guns, I'll insert the footage of myself at the range.