Weakness:
The overall novelty seems limited since the instance-adaptive method is from existing work with no primary changes. Here are some main questions and concerns:
1). How many optimization steps are used to produce the final reported performance in Figure.1 as well as in some other figs and tables?
2). The proposed method looks stronger at high bitrate but close to the baselines at low bitrate. What is the precise bitrate range used for BD-rate comparison?
Besides, a related work about implementing content adaptive algorithm in learned video compression is suggested for discussion or comparison:
Guo Lu, et al., "Content Adaptive and Error Propagation Aware Deep Video Compression." ECCV 2020.
2). The proposed method looks stronger at high bitrate but close to the baselines at low bitrate. What is the precise bitrate range used for BD-rate comparison? Besides, a related work about implementing content adaptive algorithm in learned video compression is suggested for discussion or comparison: Guo Lu, et al., "Content Adaptive and Error Propagation Aware Deep Video Compression." ECCV 2020.