FLVto is a web app with three buttons, one input box, and one simple-but-great function of converting YouTube and other Flash-based videos to MP3 audio files. We've shared a reader-submitted download-and-convert method, but FLVto makes the process pretty foolproof. Paste a YouTube or other video link (or upload an FLV file), hit "OK," then wait for your download prompt. The sound quality is only as good as the video's (as in mono sound, 60 kbps on one sample download), but with more videos going up in higher-resolution, stereo-sound formats, that could improve—assuming this app stays up and running. FLVto is free to use and doesn't require a sign-up.

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Want to share a presentation with friends, co-workers, or the web at large without worrying about who does or doesn't have PowerPoint installed? authorStream, a free presentation sharing site, offers the same kind of embed-anywhere utility as previously-posted SlideShare, but also provides options to download presentations as MP4 video files, putting slideshows with or without audio one step away from YouTube, iPods, DVDs, or whatever format comes in handy. To work as video, presentations must have either recorded narration or rehearsed timings added in PowerPoint, which the Digital Inspiration blog explains in detail at the via link below.

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