Well, it's really funny that you mention those two links, because I was just there.
AppleMacVideo: their recommended tool, WonderShare video converter, doesn't appear to work. I created FLV, MP4 videos from an MP3 and uploaded them, and YouTube said there were errors. Maybe it's different with the registered version but there's no way I'm going to pay money for a product whose demo version is broken.
MP32Tube: Again, I tried uploading an MP3 but YouTube said there were errors converting it. Even if it worked, I'm willing to pay for software that does NOT plaster its ads all over my uploaded audio.
In iMovie you can drag in an mp3, then drag in a picture and then manually set it to appear for as long as the mp3 is playing. It's a bit of a clumsy hack, but it gets the job done.
In iMovie you can drag in an mp3, then drag in a picture and then manually set it to appear for as long as the mp3 is playing. It's a bit of a clumsy hack, but it gets the job done.