Answer the following question: Given the following passage  "According to a story that has often been repeated in the media, Hurley and Chen developed the idea for YouTube during the early months of 2005, after they had experienced difficulty sharing videos that had been shot at a dinner party at Chen's apartment in San Francisco. Karim did not attend the party and denied that it had occurred, but Chen commented that the idea that YouTube was founded after a dinner party "was probably very strengthened by marketing ideas around creating a story that was very digestible".",  answer the following question. Note that the answer is present within the text.  Question: In the story, what caused them to want a video sharing platform?
Answer:
difficulty sharing videos