Official ARTMS put up a video titled "ARTMS 'Born Stunner' Official Dance Practice Ver." at 16:00 KST on August 9, 2026. It runs two minutes and forty-one seconds, on the group's own channel.

At the time of writing the upload had drawn 1,014 views, with 354 likes and 55 comments. Scroll to the description and there is no credit list under this one — the space goes to the group's own app, Cosmo, and to what the app says you can do inside it.

The first two lines read "Cosmo : the Gate" and "Where everything of ARTMS begins", and two more set out the app: "Collect limited seasonal Objekt and get special Objekt" and "Join various Gravity and cast your opinion". After that come a download link, a Cosmo web shop described as being for purchasing Objekts, and the group's official website, Discord and X.

This lands in a busy stretch for the channel. On August 7, 2026 it posted two fanchant guides, one for 'Born Stunner' and one for 'Blue Blood', and a 'Blue Blood' Visualizer the same day. None of that shows up under the practice video though: past the app links, the description carries no credits, no dates and nothing else.