If you are submitting a research paper or technical work related to film or computer graphics, the 500MB limit often applies to supplemental materials rather than the paper itself. SIGGRAPH Asia
For fans of classic cinema, the Internet Archive hosts thousands of public domain movies. Because older films often have less visual "noise" and complexity, their digital transfers are frequently available in small, manageable sizes. Managing Expectations: Quality vs. Size movies under 500mb
(2009) are frequently available in highly optimized, low-MB versions. Films like Clerks (1994) and Reservoir Dogs If you are submitting a research paper or