The VLC Media Player is an open source multimedia player for various audio and video formats, as well as streaming video and DVDs. Free to download, it works well with both Macs and PCs. The media player includes a Snapshot feature (under the Video menu) which allows you to capture stills from video. Just pause at the suitable frame and take the snapshot. These snapshots may then be used in PowerPoint, Keynote, or OIV presentations.
For more information about the VideoLAN project (including the VLC Media Player), click here.
What’s also nice about VLC is that it allows you to play back PAL and other non-US region encoded DVDs on your computer.
VLC, I use it to playback everything. Back in the day I used to go and download tons of codecs to get different types of video to play, now I just run VLC!