Tags for this video have been changed from 'tornado, canada, fugita, scale, sweet, twister' to 'tornado, canada, fujita, scale, sweet, twister' - edited by jonny

Fujita scale ≠ wind speed. It is based on damage assessments.

From the Fujita Scale wiki entry:

The Fujita scale (F-Scale), or Fujita-Pearson scale, is a scale for rating tornado intensity, based on the damage tornadoes inflict on human-built structures and vegetation. The official Fujita scale category is determined by meteorologists (and engineers) after a ground and/or aerial damage survey ...
Though each damage level is associated with a wind speed, the Fujita scale is a damage scale, and the wind speeds associated with the damage listed are unverified.

http://www.cbc.ca/canada/manitoba/story/2008/02/07/tornado-damage.html
http://www.newswire.ca/en/releases/archive/September2007/18/c2203.html

Fujita scale = windspeed, not actual damage (although they use that for estimates.
Some good photos of the area taken from the air:
http://www.kosarang.net/g4/bbs/board.php?bo_table=news_canada&wr_id=231&page=3

The Fujita Scale of Tornado Intensity - http://www.tornadoproject.com/fscale/fscale.htm

F4
Devastating tornado
207-260 mph
Well-constructed houses leveled; structures with weak foundations blown off some distance; cars thrown and large missiles generated.