> can play Dolby Vision Profile 7 FEL

This is the only reason I know about this Ugoos device. I find it so strange that Profile 7 is effectively unsupported outside of Blu-ray players and this one device. It doesn't even seem like it can be a processing power issue because the documentation says that the other profiles have higher maximum pixel rates.

I don't have the Ugoos box myself though. Instead I'm running a series of processing steps on my Blu-ray rips which converts the file to Profile 8. For every movie I've tried so far this has been fine, though I've read that some movies lean far too heavily on the FEL and have color problems without it.