It appears to be I Am Legend week at The Qwillery!
I was thrilled to find The Last Man on Earth in its entirety on YouTube. It's in the public domain. The Last Man on Earth was the first film version of I Am Legend and was released in 1964, a decade after the story was published. If you don't want to watch the entire movie at least watch the opening sequence before the credits. The sense of foreboding created by the opening is amazing and scary.