Is it worth it to re-title a series?

I have an Elden Ring series in parts.(They are more like episodes rather than walk-throughs. They focus on Bosses.)

Anyway, My most viewed video from that series is my first and second episode, but the views have dwindled as add more. I was thinking of Changing all the titles and take away the "parts" and title them like individual episodes that just happen to be connected. Thoughts?