I just upload it to YouTube as “unlisted” and share the link

In addition to what is mentioned by others, it starts the flow going to get a smooth pressure in the nozzle. While heating up the bed/nozzle, there can be an inconsistent melt in the nozzle. Sometimes a bit will ooze out and leave the nozzle empty. The purge will even all that stuff out and get fresh filament in there before it starts actually printing

Weird downvotes, but ok. It was $5, which is far less than I’d spend on filament prototyping it, let alone time considerations.

If you wanna buy me a spool of white filament, I won’t stop you

but it’s honest work