I was looking for the old Daily 123 Go videos that used to be up on Youtube but they appear to be gone. There is some playlist by someone I do not recognize that appears to have them, all marked as private videos and inaccessible.

What became of them?

Any clue how I could get hold of them again? They were excellent and a great resource to recommend to rapidly improving players, of which I know a few.

They have been made private, as have all videos by HW9x9. The channel was owned by the same people or guy that owned eurogotv.com, which shut down in June. At the same time all the videos on Hw9x9 were made private. The videos were great and it's a shame they have been made private, I have no idea why. Maybe the videos will reappear someday, it seems like eurogotv.com is "under construction" now.

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My go YouTube channel: https://www.youtube.com/user/DragonfistGaming
My website: http://learnbaduk.com/

Ah sod. I feared as much. Thanks for the definite answer, Dragonfist.