Update Case_study.md

Doc/Case_study.md

@@ -172,7 +172,7 @@ The results of these three enquiries is always a brilliant way to open an Issue
 * [RAWcooked GitHub page](https://github.com/MediaArea/RAWcooked)
 * ['No Time To Wait! 5' presentation about the BFI's evolving RAWcooked use](https://www.youtube.com/@MediaAreaNet/streams). Link to follow.  
 * [RAWcooked cheat sheet for optimization](https://github.com/bfidatadigipres/dpx_encoding/blob/main/RAWcooked_Cheat_Sheet.pdf)  
-* [Further conference presentations about BFI National Archive use of RAWcooked](https://github.com/MediaArea/RAWcooked/issues)
+* [Further conference presentations about BFI National Archive use of RAWcooked](https://youtu.be/4cG5RL_CZqg?si=w-iEICSfXqBco5NB)
 * [DPX Preservation Workflows](https://digitensions.home.blog/2019/11/08/dpx-preservation-workflow/)
 * [Introduction to FFV1 and Matroska for film scans by Kieran O’Leary](https://kieranjol.wordpress.com/2016/10/07/introduction-to-ffv1-and-matroska-for-film-scans/)
 * [RAWCooking With Gas: A Film Digitization and QC Workflow-in-progress by Genevieve Havemeyer-King](https://youtu.be/-cJxq7Vr3Nk?si=BjPWzsZ7LRKMVZNF)