Zoom Q3HD records very high quality audio along with HD video. No optical zoom, but amazing sound.
Video files consist of a container file with a video file and an audio file inside. Some combinations look the same, but have technical differences.
OpenShot video editor is a solid and effective open source tool for editing video files.
DeVeDe is a solid and effective open source tool for putting video files onto a video DVD.
VLC is a solid and effective open source tool for playing audio and video files.
Internet Archive is a great place to store video and make it available on the web.
Wordpress.com allows storage and publishing of video at an additional cost. [more]
YouTube and most video sharing websites are not recommended due to a high level of inappropriate content.