Does Platinum Disco (E-Side of YTPMV) deserve its own tag?

I understand that this excerpt from E-Side of YTPMV is a fad now and several standalone videos exist that only cover this song from the medley. However, I think it might be redundant since the medley and the song (Platinum Disco) already exist. Currently, the norm is to tag works that use an excerpt from a medley with the medley and the song separately. I believe this is not mentioned in the Editing Guidelines, but it is just a pattern I see. I would like to hear other's thoughts on this.

A similar question can be asked for Chilled Series.

My current feeling is that an excerpt of a single song from a medley shouldn't need to have its own tag. Chilled Series is a bit unique in that it's actually two songs, and it has been given a unique name that is separate from the songs.