Unable to "dock" mini-player

[HanzoX7]

HanzoX7 last edited by HanzoX7

In the Opera one page, there's a nifty little feature that I wanted to try, but haven't been able to make work:

https://cdn-production-opera-website.operacdn.com/content/one/OPCOM-13166/opera__one--box-1.mp4

In the video it seem pretty straightforward. Not sure what I could be doing wrong. Here's a link to a screen recording of me trying:

https://1drv.ms/v/c/9c8ba7157e2b1dee/EVdcYRGHQFpGkF6aql6MNBEBskSQTDDR4eMmns-q_IWhhg?e=R7uVxH