On the TV from my signature I use HEVC 4 K videos without a problem in a high quality from a Handbrake output or from this Vegas Pro 16 template

with smaller filesizes compared to AVC with the same quality.

Now if I wanted to save the 4k videos on something (like I do know with the BD's that I use), what I use? Do they make 4k Blurays?

Your best option, until you get your sea legs, is a $15 USB flash drive. UHD Blu-rays exist but the methods for authoring them and burning them are too limited to take seriously for casual, personal use.

I'm streaming 4K UHD videos to a Sony 4K smart Tv sucsessfully using the XAVC Long 3840x2160-50p template in V15. The file is stored on a network connected hard drive and I have installed VLC on the TV for playback.

Now the next challenge is HDR...

I would like to make UHD Blurays but it seems like local streaming is much easier. For buying movies though the quality of a 4K bluray is far in excess of anything I can get on Netflix etc.

I would like to make UHD Blurays but it seems like local streaming is much easier. For buying movies though the quality of a 4K bluray is far in excess of anything I can get on Netflix etc.

Interesting. I only have 2 4k Blurays, both remastered classics (Blade Runner and Gladiator). Not impressed, but not surprised, either. Most of the new movies that might look great don't hold much interest for me, so I haven't bothered to buy anything. I did notice that Redbox claims to have some UHD HDR 4k titles. Do you have any recommendations on some great looking stuff?

The most impressive 4k HDR that I've seen at home (dramas, not nature docs) is the second season of Ozark on Netflix. There were some scenes that just blew me away, the levels of dark, and quite fitting of the narrative.

The 4k format that Plex claims will stream to your tv or fire stick is 3840x2160, 30p, 8 bit h265/aac mp4. I've made some lazy attempts, but honestly I can't tell a difference on a 50" Vizio.

I'm too old to continue to trade render time for smaller files sizes. Also, I'm a-social, so I don't feel the need to share every aspect of my day with every person on the earth.

I play UHD locally on my slightly antiquated Sony XBR 850B (I think they're up to F, now). When I do share files with others, I buy the media and I give them 1080p. I refuse to have the FHD-UHD conversation with them.

Here are the Mediainfo reports for my two output pixel dimensions.

If the bit rates seem high, consider that this video has a continuously panning camera over a pool with eight swimmers splashing. Other videos, slide shows, etc., produce surprisingly low bit rates. 

Friends don't give friends UHD to download.

Now if I wanted to save the 4k videos on something (like I do know with the BD's that I use), what I use? Do they make 4k Blurays?

I've been using a dedicated USB3 external hard drive with my 4K TV. There's a ton of 4K content on the drive that plays nicely on the TV. And, I never have to get up to change discs.