[SuperSajuuk]

Nothing wrong with watching content via YouTube - Heck that might reach it's audience better.

I do think they're right to rely less and less on older content as newer content becomes available - the mistake is how reliant on one show they seem to be, but to be fair everytime they try and bring in a high volume alternative like Deal or No Deal or The Weakest Link they've just not worked out for them.

Oh I totally agree and I regularly watch old TV show content on there. However, YouTube is not a safe haven: its against TOS (and is also just copyright infringement) to upload television programmes to the site and although its unlikely to happen, there is nothing stopping the copyright owner using DMCA to take down their content and they would be in their legal rights to do that. Also, people can also just close their YouTube/Google accounts, thereby committing anything they uploaded to the proverbial trash can and it'll be lost forever.

What really needs to happen is for the copyright owners to either put their content into public domain (unlikely) or for them to give their blessing for the content to be put up on an official YouTube channel and kept there indefinitely as an archive. The latter would be more likely to happen, but the owners of a lot of old UK game shows don't seem to want to do that, which is unfortunate.

To stay on-topic with Challenge, I agree they shouldn't completely rely on older content, but as you rightly point out, they shouldn't be just "The Chase Channel". If they don't want to broadcast older content on there, there is nothing really stopping Sky placing the content behind the digital paywall of Sky Q/Sky Stream as on-demand downloads through the connected device.