That doesn’t sound right. For me, using YCC and limited throughout works with SDR and HDR. All three of my screens expect limited range when sending YCC. One of them offers full range but only for RGB. There are so many variables, that’s why I wrote this. If you have a moment, could you read through that and let us know which bits of it don’t match your experience. And what do mean by ‘messes up HDR video’? Is this with sending HDR to an HDR screen or to to a SDR screen?