Free tool
YouTube title generator
Turns a topic into a few title patterns you can actually film. It checks length. It does not predict views.
How to use a generated title
Pick the pattern that matches the video you filmed. A how-to title on a vlog, or a result title when you never show the result, trains people to skip you. If the line is over 70 characters, cut words from the end until the payoff still fits in the first line of search.
Titles are only half of packaging. Pair one with a thumbnail that repeats the same idea, then put that promise in the first lines of the description.