can i play xbox one games on mp laptop windows 10

Yes, you could do so through multiple ways, there are some titles available for both which are called Play Anywhere titles, and you purchase the game once and then can play it on pc or on the xbox one. Info and games here: https://www.xbox.com/en-US/games/xbox-play-anywhere
. Also there is game streaming, which lets you stream you xbox to your windows 10 pc and play whatever you would like., more info here https://support.xbox.com/en-US/games/game-setup/how-to-use-game-streaming
. Hope this helps!

Is it possible to connect my xbox to my laptop and use my laptop as a tv?

NO, your laptop have an HDMI out, you can workaround this using Xbox Companion App on Windows 10.

If both Xbox One and your laptop use ethernet connection to your network, you can play without any issue.

Sure The Problem With Windows 10 & Apps Try One Solution : Connect Your Xbox One With Other Laptop Running Windows 10 Ie Log In Another Laptop Running Win 10 Be Sure You Have Wireless Access Point To Connect Your Xbox App At Your Laptop With The Same Your
Xbox One If That Solved Your Problem You Need To Reinstall Win 10 On Your Dell Laptop

However, I keep seeing videos on youtube from the past where they used the xbox app and plugged in the 360 controller in their PC or laptop and windows 10 recognizes it.

If you're streaming games from an Xbox One to a PC, the PC can play the games with either a Xbox One or a 360 controller. But the Xbox One can not use 360 peripherals connected directly to it.

And of course PC gamers (like me) can use whatever controller we like with Windows.

Hi, no it's not possible, as most laptops have a hdmi out connection, not an hdmi in connection. The only way you can use a laptop as a monitor is to use Windows 10 Xbox app and stream the xbox one to Windows 10 via that method. As you say you have Windows
7, so you cannot do it anyway.