There are errors in that video.
Like where he wanted 1thou interference from a .294 neck, he suggests a .293 bushing.
It isn't that simple, and may or may not work.
What he's missing is consideration of neck spring back, and overall amount of sizing needed.
Normal brass springs back ~1/2thou at necks.
If you have high neck clearance and need to size 5thou or more, the bushing diameter needs be 1-2thou larger than desired -while accounting for spring back either way. This is because a larger bushing downsizing rolls brass inward at a continuation angle, past desired.
Then, it is beneficial to expand necks, so you really need an extra 1thou downsizing of necks, to then upsize with expansion.
And don't pick a bushing until you can 1st measure necks at the cal you intend for them (if up/down sizing neck cals).
I've never run into an 'issue' with bushing neck sizing. Just be sure to set it floating in the die body, and always follow up with expansion (with a mandrel for lowest loaded runout).