Before revision:  Extensive experiments demonstrate that HERO achieves new state of the art on both text-based video moment retrieval and video question answering tasks across different domains  .
After revision:  Extensive experiments demonstrate that HERO achieves new state of the art on both text-based video moment retrieval and video question answering tasks across different domains . We also introduce two new challenging benchmarks How2QA and How2R for Video QA and Retrieval, collected from diverse video content over multimodalities .