Phone gets slightly warm when running You Tube

[Jazzamuffin]

Anyone else?

 

[jdfry15]

My G6 runs warmer than the s8+, but it's not as bad as other phones I've had.

 

[ThrottleJohnny]

My G6 randomly gets so warm I have to put it down and let it cool. Not a deal breaker, but a small annoyance definitely

 

[Mr Mendelli]

Anyone else?

Thats normal. Depending on the specs of your device, it may need to work harder to run certain apps like YouTube. As long as it isn't steaming or burning you, I wouldn't be concerned. Lithium-ion batteries are what just about all smart phones use, and tend to warm-up while in use or while charging.