This extended commercial can be found on Gekkan Nintendo Tentou Demo 2004.6.1 (月刊任天堂店頭デモ２００４年６月号). For information about this demo disc, see http://redump.org/disc/68091/. Huge thanks to the PikminWiki for having a good translation of Tane No Uta which I largely copied for this video's subtitles.

Q: How did I create the colored subtitles?
A: I used Aegisub and YTSubConverter.