Before revision:  Using a large dataset of more than 2500 manually annotated videos from YouTube ,  we found that while multimodal features consistently outperformed bimodal and unimodal features, their performances varied significantly for different emotions, gender and duration contexts.
After revision:  Using a large dataset of more than 2500 manually annotated videos from YouTube , 176 manually annotated YouTube videos, we found that while multimodal features consistently outperformed bimodal and unimodal features, their performances varied significantly for different emotions, gender and duration contexts.