YouTube not showing all videos?

I wanted to watch older videos from a Youtuber.
When I scrolled down the YouTube channel on video on my cell phone, no more videos came up.

there were about 600 videos, all of a sudden it was the end

if I e.g. When I scroll through the Playstation for a long time, I come across much, much older videos that my mobile phone no longer shows.

is there a solution how to get to the older videos?

Sort by oldest videos so that old ones are shown first.