Hi, Apologies for replying in English, but you're currently posting in our English forum. To get help in your locale language, please check out the [[Get community support]] article, which lists other available support forums and resources by language. Regarding your question, I've been able to reproduce slow page loading with this site only once, when loading the main page for the first time in Firefox. After that, videos loaded almost instantly for me. (Note that I don't have an account there.) Here are some standard troubleshooting steps; please check if any of them helps: # Please check if you have [[Enhanced Tracking Protection in Firefox for desktop|Enhanced Tracking Protection]] (ETP) enabled. You can do that by clicking the shield [[Image:Fx89ShieldIcon]] icon in the left part of the address bar. #* If ETP is enabled, try disabling it. # If the problem is not fixed, try [[How to clear the Firefox cache|clearing Firefox cache]]. # If it does not help, try [[Clear cookies and site data in Firefox|clearing cookies and data]] for the website you experience troubles with (''warning: you will be logged out on this website''). # If it also does not help, try [[Diagnose Firefox issues using Troubleshoot Mode|running Firefox in Troubleshoot Mode]]. If the problem doesn't persist, please follow the steps from [[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems | this article]] to troubleshoot further. # If nothing from the above helps, try [[Manage Firefox profiles|creating a new Firefox profile]] and check if the issue persists there. If it doesn't, you can [[Restore bookmarks, passwords and data from an old Firefox profile|start copying files from your old profile to the new one]] to identify which one causes the issue. See [[About your important data and their files|this article]] on what files to copy.

Thank you for your reply. I'm sorry for posting in Chinese on an English forum. I just used Chinese out of convenience since I noticed Firefox has a built-in translation feature. The issue seems to have disappeared over the past month. Yes, it disappeared rather than being resolved. If other Firefox users run into the same problem, I'm afraid I won't be able to offer any useful advice either.

Got it, thank you for sharing this here! Such kind of issues are tricky to investigate, but if it starts reproducing reliably again, please reach out, and we'll try to take a closer look.