IPhone Wi-Fi connection trouble?

My iPhone can't keep a connection to my house's Wi-Fi for more than a few minutes before disconnecting. It seems like it disconnects whenever I try to watch YouTube videos on it. However, on my computer or video game system, I do not disconnect from the Wi-Fi ever. How do I fix this problem?
I have an iPhone 6s

Reset your network settings. I was having the same problem on my 6s but fixed it as soon as i did that. Settings> general > reset> reset network settings
you'll lose all your saved Wi-Fi connections but it'll fix the problem

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