This was the first New Engine Slideshow in Felix Cheng's series to have a song, rather than just be the Extended Thomas theme.
Gary and Steve from CombineHarvester01's Series were originally added, but the latter requested Felix to edit them out. When he did remake the video so they wouldn't be in it any longer, he accidentally edited out Benjamin the Bridge. Benjamin would be re-added in Part 26.
While their number isn't visible, Scarlet Violet was confirmed by Felix Cheng to be Skarloey Railway Engine No. 11