That can be previewed.

An experience of something in advance. / (colloquial) An advance showing of a film, exhibition etc. / Something seen in advance.

To show or watch something, or part of it, before it is complete.

plural of preview

Third-person singular simple present indicative form of preview

present participle of preview

simple past tense and past participle of preview

plural of previewer

A person who sees a film or TV program, etc. before its general release to the public. / (computing) A program that provides a preview of a document or other work.

(informal) An early preview or look at something, especially not yet made public.