Not quite -I could write a column in a newspaper and it would not be a blog. A Blog is an on line diary containing text and pictures. A Vlog is an on line diary using mainly video and spoken word.
blog
/blɒɡ/
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noun
a regularly updated website or web page, typically one run by an individual or small group, that is written in an informal or conversational style.
vlog
/vlɒɡ/
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noun
a personal website or social media account where a person regularly posts short videos.
"you can add travel vlogs to the growing list of travel-related material popping up on the Web"