No, taping is neither necessary nor recommended. Those rubber bits aren't o-rings exactly (unless your product has a proprietary design) they're more...
I'd have to believe that once dilbit reaches a refinery that the liquifying NG is recaptured /used in the refining process or 'refined' into another...
Watching that YT clip, first thing came to my mind: they're actors fer crisakes, they're not really doin' that, too risky! Bet there's a vetted crew...
I want to fabricate a replacement chip-catcher attachment (direct's planer chips into my dust collector) for my half-century old INCA jointer/planer....