This song is from the old movie "Ferngully: The Last Rainforest". It is a jazz song that me and a couple friends want to cover. I've looked through the searchbar and nothing came up in this section of forums. I'm hoping someone can at least figure out the key, as I am having trouble doing so. Thanks in advance.

To those that don't know the song here it is:

There is a longer version here too:

Reply to me quickly by pm at the username above please.