Danronald Yeah I think the problem is that the streaming quality from SLR is not as good as the HBR of course. And Arporn (I THINK) streams at the same quality as the download, so 75 mbit/s, although I have not confirmed this. So maybe that's why people say that arporn is better.
If you download HBR though, SLR is better IMHO. How to watch, well there are 3 options, first of all you can download directly to the headset. But there's only limited storage of course on your headset, so a better option is to download the files to your PC and then stream to the headset. There are 2 ways to do it, first is setup a windows share and then simply play the files from that share. The other options is to use DLNA, like "Serviio"
As a player you could use Heresphere on the quest for example.
Keep in mind that you can't do AI PT that way, only true PT.