Hello. I have been driving with this noise in my 2002 Ranger with the 3.0L V6 for around 2 weeks. How worried should I be? It’s the ticking/ clanking sound.

My uncle says it could be a collapsed tappet. Is that plausible or is it something else?

I uploaded it to YouTube, here is the link: https://youtu.be/iI6lSQ-FqH8?si=va3cASiV0wibutZe

Thanks