Oh man! I knew there's some more cause I keep feeling like I've missed out something! No wonder... Cause I searched it through the "ダンス系APH" tag and found most of it, while the one you linked uses "ダンス系APヘタリア". OTL

Thanks for this too!

As for the artist, I'm not sure either. ;A; But they usually post past/latest links within the descriptions at the top. For example the German Russ-K one, lookout for → sm6734790 (http://www.nicovideo.jp/watch/sm6734790) cause that leads to the artist' other videos.

Sometimes they post their "mylist/xxxx" to keep track of vids.