The Additional Protocols to the Geneva Conventions
Louise Doswald-Beck, Secretary-General of International Commission of Jurists (as found on the the ICRC website) speaks of the relevance of the 1977 Additional Protocols.
For additional discussion on the Additional Protocols, visit the ICRC webpage devoted to the subject.
Application of IHL
James Stewart, formerly with the Prosecutor's Office at the ICTY and ICTR explains that the rule of IHL will only truly develop when they are applied by international courts.
See other videos on the ICRC website regarding Accountablity.
See also videos related to international criminal law found on this website.
Links
The International Committee of the Red Cross
J.M Henckaerts and Louise Doswald-Beck, Customary International Humanitarian Law, 2005
ICRC - International Humanitarian Law Database
Protocol I -- 1977 Additional Protocol to the Geneva Conventions
Protocol II -- 1977 Additional Protocol to the Geneva Conventions