stereoscopic 360 video on focus 3

[crapshot.ai]

I am going to produce some educational content using a insta 360 pro 2 camera that can record 8K stereoscopic video and want to playback those videos on Focus 3 headsets using the Vive Video Player. I tried some demo videos available from insta360 and the 2D 8K video played fine (7680x3840, 30 fps). However I could not play the 8K 3D videos (7680x7680, 30 fps, top bottom 3D) always getting an error code. What is the maximal resolution to watch stereoscopic 3D content with Vive Video on Focus 3?