I actually had this discussion with CodeChef, and they are very interested in the idea. However, they face the following challenges:
The content quality has to be good. CodeChef should not and will not associate itself with videos that are not up to their standard.
The time to make these editorials is huge. CodeChef is a non-profit and has limited time and resources to invest. Creating video editorials for every long challenge isn’t feasible for them.
They like people taking initiative, and encouraged me to go ahead with my video editorial idea. When I saw that the Feb Long Challenge doesn’t have any, I picked the task up.
However, it might be impossible for CodeChef to officially endorse any of these. Thats the sad reality today.