Where do you live?
It looks to big to be most species of weasels and the tail is too thick. The relationship of the tail to the body is similar to a mink but it is much larger than a mink.
I'm reminded more of a fisher or marten. Knowing where you live would narrow it down.
“Travel is fatal to prejudice, bigotry, and narrow-mindedness, and many of our people need it sorely on these accounts.
Broad, wholesome, charitable views of men and things cannot be acquired by vegetating in one little corner of the earth all one's lifetime.” Mark Twain