How to link handy when viewing with a browser other than DeoVR browser

I can view it on the DeoVR browser and the Handy works, but when I view it from another browser via the SLR app, it doesn't work. Am I doing it wrong?

AlexSLR
The headsets I'm using are Oculus QQuest2 and Pico4.
The video that won't play is from a Japanese studio. I can watch it by playing it in VR from the general Oculus browser, but I can't link it to the interactive device.