A blog is:

A web site that allows the creation and editing of any number of interlinked web pages via a web browser using a simplified markup language

A video$-$sharing website on which users can upload, share and view videos

Maintained by an individual with regular entries of commentary, descriptions of events, or other material such as graphics or video.

A series of digital media files $($either audio or video$)$ that are released episodically and often downloaded through web syndication