  Fully fine-tuning pretrained large-scale transformer models has become a
popular paradigm for video-language modeling tasks, such as temporal language
grounding and video-language summarization. With a growing number of tasks and
limited training data, such full fine-tuning approach leads to costly model
storage and unstable training. To overcome these shortcomings, we introduce
lightweight adapters to the pre-trained model and only update them at
fine-tuning time. However, existing adapters fail to capture intrinsic temporal
relations among video frames or textual words. Moreover, they neglect the
preservation of critical task-related information that flows from the raw
video-language input into the adapter's low-dimensional space. To address these
issues, we first propose a novel REcurrent ADapter (READ) that employs
recurrent computation to enable temporal modeling capability. Second, we
propose Partial Video-Language Alignment (PVLA) objective via the use of
partial optimal transport to maintain task-related information flowing into our
READ modules. We validate our READ-PVLA framework through extensive experiments
where READ-PVLA significantly outperforms all existing fine-tuning strategies
on multiple low-resource temporal language grounding and video-language
summarization benchmarks.
