Skip this paragraph if you only care about how to. I have been lurking on this sub for a few weeks now as I'm looking for an Android TV Box for my new Vizio M75 TV. I had a Mibox 3 Pro. It runs android, but the user experience is much better than many Android TVs to be honest, thanks to the powerful hardware and being rooted (so I did a lot of customization such as launcher). However, it does not have HDR, and the 4k 60hz support is fake. So I'm looking for an update. Mibox International should be able to fit my need but from what I read here it is full of bugs and lack of support. Last week I finally pulled the trigger thanks to google express's 25% off coupon and Walmart's return policy. Hopefully Oreo drops within the return window so I can test its full potential (or get disappointed by more bugs).

Back to the topic. I think a lot of you have already figured it out but having a thread might help others. I can confirm it also works on MM while I haven't seen anyone mentioned it.

The solution is Smart YouTube TV + a few tweakings. The latest Smart YouTube TV web wrapper app works almost perfectly on the MM 1901, I can play 4k 60fps HDR YouTube video without frameskip! It works even better than under those Nougat betas (tested 1028 and 1560), probably due to all the CPU cores are being used. You need to manually specify the HDR video quality. You will also notice the HDR mode of your TV won't automatically turn on therefore the color looks washed out. Here you can exploit a bug of Mibox -- it won't turn off HDR mode of your TV after watching an HDR video. The steps are:

1)* Turn on deep color mode in display settings.

2. Play any HDR videos in whatever player such as Kodi or the stock one that can properly enable HDR.

3. After the HDR mode of your TV is on, stop the dummy video you were playing, go to Smart YouTube TV. While anything SDR looks strange under HDR mode, the YouTube HDR videos play as it should be. No more washed out color.

*The reason for turning on deep color mode is because I find out if I don't turn it on, many HDR videos played on Mi Box will appear more green on my TV. I don't know why.

I compared watching the same HDR video directly on my TV through USB and on YouTube with Mi Box, they appear the same to me. Then again I'm not 100% sure as I may not be that sensitive to HDR or my TV may just suck. So please tell me your thought or your test result. And lastly, hope Oreo fix this and I don't have to exploit a bug for profit 😂

Next, I might try this trick on a cheap LeEco Super4 TV I got from their closing warehouse. It runs Android TV 6.0 without any possible future support. The hardware does not clearly mentioning the support of VP9.2 but when I tested Smart Youtube TV and manually select 4k hdr stream, it does play well, with a few frameskips. And of course the color is washed out. Only if I can find out how to manually turn on HDR mode...