I have always had some difficult time finding quality videos of the highlights of the key soccer matches around the world. The best solution is to search on youtube. I am sure there are several hundred thousand (or even million) fans that would love to have a site that aggregates quality sports video clips.
Probably something like VIMEO but for sports. It should be multi-platform with key features like easy to search. Revenue would come from advertising and a freemium model. Probably start with one sport in specific that is relatively global: Soccer (aka Football).
2014 FIFA World Cup™ reached 3.2 billion viewers, one billion watched final. [Updated]