>I purchased SnagIt a few months ago and I have done some screen captures.
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>Now I am learning how to do video captures. Basically I want to create some small (no more than 10 min) training videos of some features of my app. The first thing that I noticed is that SnagIt creates the video in .MP4 format (Because when I hover over the date-file created in some temp folder the extension is .mp4). If I then, later, send such an .mp4 file to a customer, how easy or difficult will it be for a Windows user to view this? Should I change (if it is possible) the format that SnagIt uses when creating video captures?

It's not that it's a .mp4 format - I just bought a video camera and it produces .mp4 files, which my PotPlayer recognizes immediately.

But that's not the point; practically each video format is just a protocol of how to wrap video information into a file, so that the software reading it would know what's inside and where each part is. The actual encoding may be done in different formats, by different processes - depending on which codec (coder/decoder) was used. There are many such things out there, and unfortunately SnagIt seems to use one of its own, or at least one that is not commonly found.

Last time I did a video with SnagIt, I had to convert it to some other format, using a more common codec. VirtualDub (a freebie GNU thing) should suffice for that. You can also use it to snip out the unwanted pauses, places when you stopped talking and moved the mouse to click the button to turn recording off (or was it a hotkey? it's been years...).