Video is not loading properly in sam2demo.

I'm sorry if it doesn't come across well, as I'm translating from Japanese to English using a translation machine.
Regarding sam2demo (https://sam2.metademolab.com/demo), both the initial default video and the video I uploaded only load the first few frames, and nothing beyond that is loaded.
The computer I am using runs Windows, and I open sam2demo either from Microsoft Edge or Google Chrome. The same issue occurs with both.
I first noticed this issue around noon Japan time on August 15. The same problem occurred when I tried it just now.
On the other hand, it seemed that selecting moving objects and background transparency were functioning normally.