1. i understand the lyrics. it is a song of mussar, and the battle between the nefesh and the guf, which the author feels is a losing battle, not necessarily talking about physical death. the website i posted before has a nice explanation on the left side of the page (scroll to the bottom, after the history of the song).
2. the name of which website?
3. the recording on that site is not so nice, but i think the tune itself is accurate. incidentally, R’ Kaplan zt”l did not compose that tune, it just happens to be the most popular one to sing it with… (again, see the info on the website).