2018/04/05: When all you gotta do is a few cuts here and there and trimming out the shaky parts of that birthday video, a full-fledged video editor might be an overkill. This is where LosslessCut comes to save your day
Updated 2015-11-16 for WebM
It doesn't take long to get comfortable working in the Kdenlive timeline, but it does take a little bit of work to get efficient. Seth Kenlon offers some tips.
Don Watkins shows us how to convert old VHS tapes into MP4s in Linux with this helpful how-to.
Subtitle Editor is a capable video editing tool kit to transform, edit, correct, create or refine existing subtitles on GNU/Linux/*BSD. Based on GTK+2, It also shows sound waves, which makes it easier to synchronize subtitles to voices. You will not find too many capable applications in Linux that specialize in adding or editing subtitles.
The OpenShot video editor gets my pick for best combination of features and ease of use. It may be the only video editor you'll ever need. Use it to combine video footage, audio tracks, and still images. You can have captions, animated titles, overdubs, "Ken Burns" effects, and capture directly from a tethered camcorder. Then you can export your video to your desired format for YouTube, high definition, television broadcast, Blu-ray, and even the new WebM streaming format.