For film language discussing textual analysis, look at the Specification here (page 18)
There are many other websites that have glossaries as well as books that have indexes, such as the OCR textbook
For example, http://www.educationscotland.gov.uk/Images/medstudhglossary_tcm4-168240.pdf
http://www.mediacollege.com/glossary/
http://media.edusites.co.uk/
http://brianair.wordpress.com/film-theory/glossary-of-media-terminology/
http://www.nzqa.govt.nz/qualifications-standards/qualifications/ncea/subjects/media-studies
/glossary/