CapCap is a gamified version of Collaborative Caption Editing System (CCES), where each micro-task transcribes a short video segment (typically less than 10 seconds). It provides video captions while also developing the linguistic skills of non-native workers. It counts with additional motivating features: levels, ranks, and teams. The level goes up as the worker’s accumulated points increase. The system shows the team ranking and the level distribution within the worker’s team