On each movie's IMDB page, click on "see more" in the Company Credits section. Everyone listed under "production companies" is a stakeholder in the film; most licensing can be done through whoever the biggest name is.
Rights are likely still controlled by the BBC.
If you're lucky, there will be a copyright notification printed on it somewhere. If you're not, you can only hope they formally registered it, and in a way that enables you to find it in the registry's database.
There are several entities by that name, but most are registered trademarks.
I would assume Richard O'Brien still holds the copyright.
It depends on the type of material. Books have notifications on their copyright pages; movies include notifications in the credits; fine art may not be marked at all.
Downloading movies is a form of copyright infringement.
Unless other arrangements were made, the creator is the initial copyright holder.
Warner-Tamerlane.
Muppets, Inc.
Unless other arrangements were made, the creator is the initial copyright holder.
Since illegal under copyright laws, you will not find a place that is any good
Movies are copyright protected and illegal to copy