Why should these actors pay for others to learn? To the extent that what is provided is a public good, I see no problem with it being government subsidised. Revenue from students is more difficult, but (a) students would continue to receive distinctive returns for their payment (such as library access and tutorials) and (b) the issue, anyway, casts as much question on whether university education should be student or government financed as on the proposal above.
Are not the courses the intellectual property of the lecturers and, thus, within their right to disseminate as they choose (including, if they wish, only for a fee)? I have some doubts about whether university courses, especially those publically funded, can be deemed individual intellectual property, but, even if so, lecturers would not need to exercise this right and the case here would imply that they should not do so.
Would it impact badly on student attendance? Might it even, as some lecturers have worried, undermine the viability of some universities and cost jobs if students can study by watching online lectures posted by other institutions? I doubt either of these effects: evidence shows access to online material typically does not decrease attendance and, as noted above, universities will continue to attract numbers and attendance based on the other, more site-specific components of their teaching profile.