You can do is what called overburning, but it does gain you a whole lot. For the most part the answer is no.
A DVD advertised as 4.7 GB may seem to hold less than that because manufacturers quote the capacity of a writable DVD disc using decimal prefixes rather than the binary prefixes used by some software. This can be confusing. While a 4.7 GB DVD can store 4.7 billion bytes [4,700,000,000 bytes Ã· 1000 b/kB = 4,700,000 kB Ã· 1000 kB/MB = 4,700 MB Ã· 1000 MB/GB = 4.7 GB], using binary prefixes the same capacity is roughly 4.38 GiB [4,700,000,000 bytes Ã· 1024 b/KiB = 4,589,844 KiB Ã· 1024 KiB/MiB = 4,482.27 MiB Ã· 1024 MiB/GiB = 4.38 GiB].
If your movies are small enough you can add multiple movies to one disk.