Update dataset availability note

README.md

@@ -44,7 +44,7 @@ Project links:
 
 SparseVideoNav studies real-world vision-language navigation with sparse future video generation. The datasets contain language instructions, RGB frame sequences, and low-level navigation actions. The number of actions matches the number of RGB frames for every released episode.
 
-This repository version contains the processed IFN and BVN subsets. All RGB frames have been processed with EgoBlur for face and license-plate blurring. At the released sampling rate of **4 fps**, the current IFN+BVN release contains **121.74 hours** of navigation data.
+This repository version contains the processed IFN and BVN subsets used by SparseVideoNav. The complete dataset contains about 140 hours; due to regional policy restrictions, the currently open-sourced portion is approximately 121.74 hours.
 
 | Subset | Episodes | RGB frames | Duration @ 4 fps | Task |
 | --- | ---: | ---: | ---: | --- |