Some Guy, how did you calibrate it with Sekonic and x-rite?
How does the S6 Edge+ compare to S6 Edge, apart from the obvious features, such as the bigger screen and an additional GB of RAM?
Does S6 Edge+ only support the "live broadcast" mode and the UHQA format?
There is some app from x-rite called ColorTRUE. Load that freebie. Then you need the USB mini/micro (??) Samsung adapter from the phone to a female USB. Then a x-rite i1Display Pro calibration head plugs into that. When you launch the ColorTRUE app, it has you place the head on the screen and it pretty much does it's own thing. You do need to launch ColorTRUE with the Gallery photo viewer though as it only applies the profile correction to whatever photo viewer you use if it is running.
More here: https://www.xrite.com/colortrue
For the Sekonic light meter, if you have the RAW camera app (e.g. Camera FV-5, which I still find has serious issues with the auto-focus in that program vs. the OEM camera which is far sharper, but least I can focus manually with FV-5.) that also writes as a DNG image file, you can use the Sekonic L-428D meter software and their Profile 2 target and generate an exposure tuned profile to put into the meter's memory to calibrate it to the S6 camera's behavior. That's how I found the cell camera tends to be a bit hot in the highlights against the Nikon DSLR's (About one stop too bright.) but it still isn't that bad and is pretty even with them down into the shadows as well.
No doubt you might be able to use the same DNG and the x-rite ColorChecker target and software and generate a profile for Lightroom, etc. as well. I haven't tried that one yet. I might try that test in a few days.
As to the memory, I went with the 64GB version of the S6 Edge in anticipation of the RAW files which seem to average out around 31MB in size. I have found with the apps and the larger internal memory, loading too many of them really taxes the battery as some run in the background far too much and can kill it off in maybe 5-6 hours. I've removed a lot of them and unloaded them, plus shutting off the "Location" beacon part helps. Too bad too much of the Android bloatware/snoopware can't be shut off to "data on demand" or something without resorting to a hacked OS. Some of it just restarts on its own which is annoying.
Sorry, no knowledge on the video part as it's not something I've used yet. I've seen some nice videos shot with the 3-axis stabilization gimbals that sell for about $300 though even though the cell camera has optical stabilization (which doesn't seem to work well with Camera FV-5 yet either). Someday...