Don't acknowledge the original writer,, Willie Dixon or the original,singer Muddy Waters and copy the cover of it and it is very easy indeed. The great Peter Green did a version of it before Led Zep.
First time I've seen that clip - thanks for sharing, looked a class gig; I saw most of them together at the NEC when they toured over here in the early 80's, they were absolutely brilliant, I can only imagine how good they were in their raw youth.
Sadly Cookie V, Cornelia Redmond-Chavez, died in 1999 aged 50.She was a big favourite of Bo Diddley and toured with him for 25 years. She also did some solo singles.