The Gilded Gabbai, in his comments to the Big Gong's guest post, writes on "Puff, the past-his prime chazzan", who mis-applied the victory kaddish":
"Said chazan contends that Yossele Rosenblatt composed the "victory Kaddish" for use on regular Shabbatot."
a few comments:
1. Although the NF and his contemporaries refer to the said kaddish as "the victory kaddish", in fact, in liturgical writings, it is usually referred to as "the chassidic kaddish".
2. It was not composed by Yossele Rosenblatt but rather by Yankele Gottleib (1852– 1900), better known as Yankel der Heisereicher (Yankel the Horse Runner) ---- you really have to wonder about that name.
3. Of the internet sources I have found, not one says that the melody was composed for weekly Shabbat use.
4. According to this blog, the melody was composed for the kaddish titkabel at the end of neilah but its use has now spread to all kaddishim titkabel during the yamim noraim.