There are a couple of different ways that people who post custom/restoration/vehicular transformation videos tend to do things. By far, the most common seems to be a multi-video approach to the project, showing you various steps (sometimes time-lapsed, sometimes not) that will eventually lead to a cohesive whole. Sometimes, they'll do this while the project is still underway; other times, they won't post it until after the project is complete.
Honestly, with the amount of work involved, it's not at all difficult to see arguments both ways. If you post as you go, on the one hand, it can be a way to keep yourself accountable, or maybe open up a conversation between yourself and other enthusiasts about how you're doing what you're doing, and whether someone with more experience might have useful advice if there's an aspect you've never tackled before. Enthusiasts are passionate people who like learning things, and frequently, it's a superpower!
And then, there's the quietly understated, short-form walkthrough, after the project is done. That's a rarer project video type to find online, but it's exactly what JT Built It posted as their very first YouTube channel entry a couple of months ago. To be fair, he'd been posting a bunch of stuff about this project earlier on in the build on Instagram, but I think you'll immediately see why so many people were like, "dude, why don't you have a YouTube channel already?"
