1. get a mp3 copy. search:: "save youtube mp3";
2. search: "edit my mp3 online", sites like mp3cut dot net.
3. make your ringtone and download at site from #2
Yes it is sideways but you only need to do it once.
My father-in-laws starts right at "were you born an .......... or did you work at it your whole life" Definitely turns heads with varied response of laugh to appalled.
A customer came in where I worked and his phone goes off, "Evil Woman" by ELO. Once he hang up he says "Sorry, that was my ex-wife."
I cut and pieced together the beginning of Tom Sawyer, about three seconds, to play several times. Was cool, but I couldn't hear it sometimes. I just use the old-time phone ring now.