Do you have access to a PC?
Check out this article, looks like the VLC app can play the file format the videos are encoded in.
If you can borrow a PC for an hour, this can get it done.
I'm sure you could find a torrent. Try searching on the pirate bays or something (make sure you have decent anti-malware or antivirus or something though)
(it's on hulu [US], could maybe do a free trial and then cancel, though I have no idea if you can do any "watch together" type of shtuff involving hulu)
my quick googling came up with this, not sure if good or not:
https://thepiratebay.org/torrent/16496780/Wilfred.US.S01-S04.Season.1-4.Complete.720p.HDTV.X264-MRSK