What a YouTube URL slug can and cannot do
You do not pick watch?v=. You pick the title, and YouTube builds a readable extra path from it. Clickbait titles make clickbait slugs. “I Tried Editing a Podcast in One Hour (Honest Results)” can become a ribbon of filler. edit-podcast-one-hour is enough. The on-video title can still sell.
Custom channel URLs are a different setting. This page is a title-to-slug tool for video links. No emoji. No “FINAL_v7”.
Titles that fight the slug
All caps. Emoji. “WAIT FOR IT”. Two topics glued with a slash. The generator knocks punctuation down. It will not save a title that is two videos in one. If the thumbnail is lighting and the title is microphones, pick one for the URL slug.
Series codes help when you actually have a series. s2-e4-podcast-lighting is readable. If you do not have a series, skip the season numbers.
When the YouTube title changes
Titles get rewritten after upload. Old pasted links still resolve because of the ID. If a video is going into a campaign, freeze the title, generate the slug, and use that paste. Tweak the wording later if you must.