In case you have any doubt about Google not playing well with others, this blog article and the sources cited there will dispel any hope that we may one day see an official YouTube app:
Google is “tightening the screws” on Android to keep control over the web – Quartz
In a nutshell, Google is forcing Android device makers to make and sell Google phones. Android users won't have the option of replacing Google with Bing for web searches. Their phones will come with all the Google crApps on the Home Screen. They will "enjoy" total immersion into G-world. Why is Google so adamant about Android users using Google services? Because Google makes their money selling advertising. Most users aren't going to attempt to remove the tools that came with their phones. They'll see them as something that adds value. Adds value it does. For Google. All of Google's "free" services are just lures to get audience for advertisers. Advertisers who pay for impressions (the number of times their advert is displayed on user screens) or per click/tap (the number of times a user visits their website after seeing their advert on a Google or Google-affiliate page). Users are not their customers. Users are their product.
So don't expect to ever see a YouTube app on your Windows Phone. Despite the fact that would put a Google app on your phone and give them revenue from advertisers, the small-minded management at Google would rather maintain the illusion of app disparity. IMO, any user who chooses an Android phone because of the "official" apps available (including YouTube) deserves to be exploited by the Google bully.
Google is “tightening the screws” on Android to keep control over the web – Quartz
In a nutshell, Google is forcing Android device makers to make and sell Google phones. Android users won't have the option of replacing Google with Bing for web searches. Their phones will come with all the Google crApps on the Home Screen. They will "enjoy" total immersion into G-world. Why is Google so adamant about Android users using Google services? Because Google makes their money selling advertising. Most users aren't going to attempt to remove the tools that came with their phones. They'll see them as something that adds value. Adds value it does. For Google. All of Google's "free" services are just lures to get audience for advertisers. Advertisers who pay for impressions (the number of times their advert is displayed on user screens) or per click/tap (the number of times a user visits their website after seeing their advert on a Google or Google-affiliate page). Users are not their customers. Users are their product.
So don't expect to ever see a YouTube app on your Windows Phone. Despite the fact that would put a Google app on your phone and give them revenue from advertisers, the small-minded management at Google would rather maintain the illusion of app disparity. IMO, any user who chooses an Android phone because of the "official" apps available (including YouTube) deserves to be exploited by the Google bully.