Changing can work. If you scroll back to the start of a lot of popular providers and you'll find the originally produced very different stuff.
Even established channels can change. Eg JillBearup[1] used to post videos about science fiction, fantasy, movies. About 8 years in she started a new hobby and posted a few videos about stage fighting that were popular and then pivoted to costumes and fighting in movies. Roughly 10x jump in views per video.
or Scott Manley, who 5+ years ago was making videos about the video game Kerbal Space Program, and now makes space news videos that typically have 150,000 or more views.
Even established channels can change. Eg JillBearup[1] used to post videos about science fiction, fantasy, movies. About 8 years in she started a new hobby and posted a few videos about stage fighting that were popular and then pivoted to costumes and fighting in movies. Roughly 10x jump in views per video.
[1] https://www.youtube.com/@JillBearup/videos