Get youtube channel videos of particular channel using PHP Code

I want to display youtube videos for particular channel in XML format.This is the channel for which I want to retrieve videos:

https://www.youtube.com/channel/UCxiaIKXjo25U1AMCBAcplRQ

can anyone suggest how can i get XML format video listing for particular channel from youtube. I just want URL for which i can get what i want.I can write PHP code to use XML retrieved from youtube API URL.