I created a playlist that does this using an &list=UL extension a few years ago and have been using that playlist ever since, but I took a year long break from watching the channel playlist and now that I’ve come back, it no longer assembles the playlist correctly. The videos used to appear in the actual order they appear on the channel. They are now in roughly chronological order, but videos in the same series are sometimes clustered together on the playlist in small groups. So for example, a series with 30 videos might have the first 7 videos in order, then 7 videos from another series, and so on. Is there a way to create a playlist with the videos ordered correctly? I suspect that part of the problem is the huge number of videos on the playlist.
I have tried googling this problem, but all the information out there on seems to be outdated.
Here is the playlist I have been using: https://www.youtube.com/watch?v=QmHNZqg3rV4&list=ULNEorhD0IzYA