Imho, what you are watching on which channel, or the device you are watching it on, is not the issue really.
It’s just difficult sometimes as a married couple to communicate about how each of you want to spend your down time together.
Some couples let life flow spontaneously. Others prefer a more curated approach. And many of us have a mix of both.
It’s very easy to get in to the habit of making an effort for children, family and friends and others in your life, such as colleagues, while you and your spouse fall in to a familiar pattern of unsatisfying low level interaction eg watching telly or You Tube together. Blokes are particularly bad at this sometimes I think.
If you are feeling slightly disconnected from one another, or you are very different in your approach to down time, it can lead to problems over time.
I think it’s particularly important when you have young dc to properly connect with each other every three or four days by going out on a walk, or agreeing to eat a meal and watch a film together or just go out for a coffee, or just get in to the habit of having a drink together and discussing the day before any devices go on.
So I am voting that you are both being unreasonable op. Your dh for just selfishly doing what he wants as though you are not in the room. And you for getting in a huff and not discussing this issue with him and suggesting that you agree to do things differently.
It’s probably not so much the choice of channel that angered you, it’s that you felt ignored and disrespected in your own home maybe? And that you weren’t consulted?