can i use games from xbox one in xbox 360?

No. Backwards compatible 360 games can be played on the One, but not the other way around.

You can not purchase Xbox 360 games using Xbox balance from Xbox one or web. Only way you can use that balance is to use Xbox 360 console.

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 JiR95,

Currency/Microsoft Account Balances can only be used on a game's respective consoles. This means that since you are trying to buy an Xbox 360 game from an Xbox One, you won't be able to. In order to use your account funds, you can only purchase Xbox 360
games from an Xbox 360 or Xbox One titles from an Xbox One. Also, the backwards compatible titles are sold using a webface that is similar to the Xbox.com site meaning you will only be able to purchase games with a Credit/Debit card or PayPal account.

~Blitz

You can only buy 360 games from a 360 console, when trying to use the money on your account. The 360 marketplace "back end" is different than the one for Xbox One.

From the Xbox One, you can buy 360 games with a CC or paypal just not the funds that are on your account.

If you need/want to buy a 360 game with your funds, you'll need to get your account on a 360 console and make the purchase.

There is nothing that Xbox Support can do for this.

https://majornelson.com/blog/xbox-one-backward-compatibility/

From the site above:

"A few things to note:

The Xbox 360 Marketplace and the Xbox One Store websites use different architecture, so if you have credit but no payment option associated with your account, you won’t be able to use the credit to purchase Xbox 360 titles. You will have to add a payment option
or purchase the title using an Xbox 360 console."