But how, exactly, does one make such a video? I’ve had multiple readers ask me about how I do mine, so I thought I’d explain the process. Because the Journal employs professional producers who help me, the method I use isn’t a purely amateur experience. But most of it is the same as what anyone could do at home. One look at my (ahem) production values confirms that. You can see for yourself at wsj.com/mossbergvideo.

My method is pretty simple. Shortly after writing the columns each week, I sit down in front of a computer with a built-in video camera and record the commentary using the free software that comes with the computer. Then, using the same software, I convert the movie into a format our Web producers can use and upload it to them. They add titles and insert footage of any products I’m discussing.

I have recorded most of these videos in my home office in Maryland, using a desktop computer. But when I am on the road, I have used a laptop in hotel rooms from Las Vegas to New York City to Munich. At home, I use a professional microphone supplied by our producers, but on the road, I just use the laptop’s built-in mic. And I don’t use any special lighting.

In both settings, but especially in hotel rooms, I make sure the parts of the room that get in the shot aren’t too messy or distracting. Nobody wants to see a used room-service tray in one of these videos.

So far, I have done all my videos on a Macintosh, either an iMac desktop or a MacBook Pro laptop, and I’ve used Apple’s built-in iMovie software — mostly because it is simple and reliable, and produces good videos despite unpredictable conditions. It also easily exports the videos into QuickTime files, an Apple format that our producers — who also use Macs — can easily use. YouTube can use this format, too, along with other formats.

Such videos could also be created on a Windows computer that has a camera and accompanying video software. I have tested this on a Hewlett-Packard Pavilion dv6000 laptop with a built-in camera, using the free Windows Movie Maker program in Windows XP. The videos recorded fine, and I was able to save them in Microsoft’s Windows Media Video format, which the Journal producers — or sites like YouTube — can use.

Unfortunately, on this particular H-P computer, I’ve had problems with the video and audio being out of sync, an obstacle I’ve never encountered on the Macs. But I assume that doesn’t happen on all, or even most, Windows machines.

My videos are very basic: It’s just me talking into the camera and occasionally holding up a product. I’m not moving around much, or including other people. I don’t usually record multiple takes, and I don’t have time to do editing. Because I don’t care much about production values, there are shadows and the sound is hardly perfect. But you could use the same hardware and software to make more elaborate videos with better lighting and sound. Both iMovie and Windows Movie Maker allow extensive editing, the use of video effects and the addition of titles and transitions.

You could also buy better video software. For instance, our producers in New York edit my videos using off-the-shelf Macs running a high-end Apple video program called Final Cut Studio, which costs $1,299. A simpler version, Final Cut Express, costs $299. On Windows, there are video programs like Adobe Premiere Pro, for $849, or the simpler Premiere Elements, for $99.

What if you want to use a digital camcorder or the video function of a digital still camera, to shoot your videos? Well, you can easily do that and just import your videos from the camera into your Mac or Windows computer using a cable and most video software.

After you’ve imported the video and saved it to your hard disk, you can either directly upload it to YouTube or another Web site or edit it first before uploading.

While my computers have built-in cameras, if yours don’t you can buy an add-on, such as the external iSight camera made by Apple. For Windows computers, Logitech and others make a variety of external cameras. If you use a Mac, I also recommend a small program called iGlasses, a terrific $8 utility that can tweak Apple cameras to compensate for poor lighting or to enhance images. It is available at www.ecamm.com.

Two other tips: Remember to look into the camera, not at the screen, so you don’t appear to be looking away from the viewer. And if you wear glasses, as I do, turn off the screen, so it doesn’t reflect in your glasses.

If I can make videos, so can you.

Email me at mossberg@wsj.com. See video versions of my reviews at wsj.com/mossbergvideo.

Now, there’s an even better approach to running Windows on a Mac. It’s called Parallels Desktop for Mac, and it’s from a small Herndon, Va., company called Parallels. It emerges from testing today and goes on sale for $79 at the company’s Web site, parallels.com.

I’ve been testing Parallels Desktop on a new MacBook Pro laptop, and have found it works very well, despite a few drawbacks. I prefer it to Apple’s solution, even though the Apple approach is free and also works very well.

Apple’s system, called Boot Camp, has one big limitation: It allows you to run only one of the two operating systems at a time, requiring you to reboot the computer to switch between them. As a result, you can’t quickly jump between Mac programs and Windows programs. You can’t, for instance, simultaneously download your corporate email in Outlook using Windows while editing a home video in iMovie using the Mac OS.

With Parallels Desktop for Mac, you can do this. You can run any combination of Mac and Windows programs at the same time, on the same screen. No rebooting is necessary. You can even cut and paste material between Mac and Windows programs, and share files between the two environments.

The Parallels approach, called virtualization, runs Windows, with all its features, inside a window in the Mac operating system. It creates a faux Windows PC, called a “virtual machine,” that co-exists with Mac OS X. You can devote the full screen to either operating system or you can reduce Windows, and whatever programs it’s running, to a window on the Mac that can be dragged anywhere on the screen and made as small or as large as you like.

Unlike Boot Camp, Parallels Desktop can run every version of Windows back to Windows 3.1, not just Windows XP. It can also run Linux and even older operating systems like OS/2 and MS-DOS. You can even create and run multiple virtual machines, with different operating systems inside, up to the limit of your Mac’s memory.

Virtualization isn’t a new concept, and it’s not even new on the Mac. Microsoft offers a product called Virtual PC for Mac that runs Windows inside a window on older, pre-Intel Macs. But Virtual PC runs painfully slowly on these older Macs, and it can’t run every Windows program. It doesn’t run at all on the new Intel-based Macs.

Parallels Desktop runs Windows a little more slowly than Apple’s Boot Camp does because it is accessing the Mac’s hardware through the Mac operating system rather than directly, as in a dual-boot system. But, in my tests, it was very snappy, as fast as many regular Windows computers.

Inside my virtual Windows machine, I was able to run programs like the Windows version of Microsoft Office, the Windows versions of the Firefox Web browser, iTunes, Adobe Reader, Google Earth and more. All worked well, as did Microsoft’s Internet Explorer Web browser, Google’s Picasa photo program and Google’s Google Talk instant-messaging software.

I was able to do email in Apple’s Mail program while simultaneously watching a baseball game in Internet Explorer inside my Parallels Desktop Windows virtual machine. I wrote part of this column in the Windows version of Microsoft Word and part in the Mac version, cutting and pasting between the two.

And, unlike Boot Camp, Parallels Desktop doesn’t require you to dedicate a fixed section, or “partition,” of your hard disk to Windows. Its virtual Windows computer is contained in a big Mac data file that uses only as much space as Windows needs.

Setting up Parallels Desktop is fast and easy, though some novice users may find the program’s terminology a little daunting. As with Boot Camp, you have to supply your own copy of Windows to install once you create the virtual machine. And because the virtual Windows machine created by Parallels behaves like a real Windows computer, you have to install the usual raft of Windows security software.

So what are the drawbacks? I couldn’t eject a CD in Parallels without switching back to the Mac environment. Parallels treats fast USB 2.0 ports on the Mac as if they were slower USB 1.1 ports. It doesn’t support Microsoft’s DirectX technology, which many games rely on. The company pledges to fix these things in future versions.

Also, if you elect to use the optional file-sharing feature, your Mac data files could be corrupted or erased by a Windows virus. For that reason, this feature is turned off by default.

Still, Parallels Desktop is a very good product and a pleasure to use. It’s like having two computers in one, the best of both worlds.

• Email me at mossberg@wsj.com.