This is a very good point about UGC and how it's not really present for most other types of media (like you described) and unaddressed by existing copyright law

This is a very good point about UGC and how it's not really present for most other types of media (like you described) and unaddressed by existing copyright law. So - additional legislation is necessary. Maybe something where the platform host has to either make the UGC available for direct download immediately, or preserve it on their own servers at their own expense until the copyright expires?