S7 overheating and shutting down while filming?

[Emig5m]

Bought my first S7 when it first came out. As I'm walking out of the ATT store I'm thinking to myself, damn this phone is nearly burning my finger it was running so hot! Previous phones where a S5, S3, S2 and never thought to myself that they ran overly hot.

Some time goes on and I notice that the back cover of the phone is expanding off the phone due to the battery expanding.

I get a replacement S7 through insurance which is a refurb.

Everything seems like look and feel like a brand new phone, however, about 20 minutes into filming it starts badly overheating, glitching out (studdering video) and will either stop recording audio with tons of skipped frames, crash, or just completely shut down.

Outside of this, everything functions as normal. I did previously do some long filming with my original S7 at a outdoor motocross race in the hot and humid August heat all day and don't remember having this issue.

Do I have a defective phone and can a new S9 film for over 20+ minutes without cooking itself?

Is there any setting I can adjust that might alleviate my problem like say, turning off HDR, etc?

 

[chanchan05]

Since it's a refurb, it would be difficult to say which parts of it has a problem. You should have just did a battery replacement on the old one. That said, heat really isn't very good for batteries, and the chemical reactions inside do have a chance of developing air in high heat environments, causing expansion.
I've played games on my S9 for up to an hour on max performance mode (by default it's throttled in the S9, I have to go to game tuner and turn on +5 CPU performance and go through warnings of heat etc before you get max gaming performance on an Samsung), and there were no issues. It does get warm, but I never felt it went as hot as my old S7 Edge. Although admittedly an older battery does get warmer than a newer one. Games would typically use up more processing power than recording, so I guess that measn the S9 would do okay in your use.
Also, your case may play a role. A lot of protective cases do use thicker TPU material, which doesn't really allow as much heat dissipation through the back. I switch between a thicker TPU and plastic case when I'm out and a very slim clear case that came free with my S9 when I'm indoors. It feels to me that the screen of the phone is hotter when I have the thick case on, rather than the slimmer one. Possibly because the back of the thicker case remains cool, which I think means that the heat cannot dissipate through it, and is therefore trapped in, which is bad for the battery in the long run.

 

[Emig5m]

Disabling video stabilization seemed to help a lot plus it films a wider viewing area with it disabled and still looks just as steady (and smoother looking at the same time.) I had been filming/testing with both, my S7 and S5 and noticed that the viewing area wasn't as wide on the S7 as it was on the S5 but disabling video stabilization on the S7 made the video just as wide as the S5. Interesting. I have yet to try a longer recording session to know for sure but I suppose I could just leave it sit filming on a fully charged battery until it nearly drains to nothing and see what happens.