Brave Browser has the most seamless Youtube ad skipping that I have come across. The ads do not appear at all, it is as if the videos don't have ads.
Orion browser, in my experience at least, appears to play just the first second of an ad before skipping it. It is common for a Youtube video to have two ads, and so this still adds several seconds of delay before a video actually starts, in contrast to Brave that is somehow able to start the video immediately, ad-free. Brave does this on both desktop and mobile.
The feature would make Youtube ad skipping be even better than it already is, and make Orion an even more appealing competitor to Brave — currently any user would consider Brave to be superior to Orion in this particular feature.
They would be able to watch Youtube videos without any hint of seeing any ad at all, nor any delay, just like is possible on Brave Browser.