At https://sdiy.info/wiki/User:Rob_Kam/Test_page (section ''Multimedia''), the video and audio files have stopped displaying, no matter which browser I use. How to get audio and video files, and YouTube hotlinks to display again please.
The wickets extension was disabled recently because of security issues. The best place to post this request would be on the Community Noticeboard to seek help from other users.
Besides that, the YouTube extension is available to display YouTube videos.