A blog is defined as a Web Log, an online journal consisting primarily of text. With the evolution of the Internet and as technology surges, the IT skills of bloggers runs parallel along it.
As Gunther argued, "communication has always been multi-semiotic" (Kress, 1997, p.60), gradual adoption of colours, graphs, images and sound intensifies its content and personalises the blog, giving bloggers a sense of individuality and ownership.
With the 'outbreak' of online video sharing site such as YouTube 
the union of these two powerful media are now complete. Bloggers are increasingly embedding an amusing or controversial video to posting a 'traditional' text-based post.
This adoption is taking an increasing number of bloggers and turning them into 'Vloggers' instead.
Some examples of such blogs can be found here:
Blog1
Blog2
Video blogging, or Vlogg is a form of blogging for which the medium is video. Entries are made regularly and often combine embedded video or a video link with supporting text, images, and other metadata (Wikipedia, 2008).
Will this result in the World Wide Web becoming a giant online video store?
Images Reference:
www.youtube.com
Reference:
atheistmedia.blogspot.com viewed: 21 September 2008
freedom100cc.blogspot.com viewed: 21 September 2008
Wikipedia viewed: 21 September 2008
Kress, G 1997, 'Visual and verbal modes of representation in electronically mediated communication: the potentials of new forms of text' in Snyder, Ilana (ed.) 1997, Page to screen: taking literacy into the electronic era, Allen & Unwin, St Leonards, Chapter 3, pp. 53-79