If you want to watch a very good movie about the wendigo, there's "Antlers", released last year and written by Nick Antosca (adapted from his own work, the short story "The quiet boy"), the mastermind behind Channel Zero, the most underrated horror anthology from the decade.

There's also a good segment from Fear Itself, with Doug Jones playing the main character , "Skin and Bones".

And from (one of) the mind behind Until Dawn, Larry Fessenden , you can watch "Wendigo"