valerianVR My Pico 4 system version is also currently 5.1.
Try downloading the vids that are WAAAAY beyond Pico 4 max resolution. Do they look better? Does the machine lag or skip frames?
I downloaded some trailers. One at 8192x4096 was smooth with no noticeable lag or skipping, but it wasn't as clear as one from CzechVR at 7680x3840, which was also smooth.