An Idea For Sharing to Twitter via Desktop Companion App

You share clips on Twitter the exact same way you share them to your activity feed, through a message, or to your showcase. Twitter's a new option right alongside those. Simply press the menu button while a clip is highlighted or playing and go to share;
a sub-menu will then pop-up with those options, Twitter included. If you have not used Twitter on the console before, you may be prompted to sign into your Twitter account or to go to the website via the IE app in order to sign up if you are new to Twitter.

That's the thing, the option to share via Twitter in the pop-up sub-menu was absent on mine. I haven't used Twitter on my console yet though. I assumed it was an app like it is on my phone. I'll sign in on IE through the console first to see if that works.

yeah I have to wait to share on my twitter too, no problem though at LEAST they are able to be shared, since I have my tweets go directly to my timeline on facebook too!

You can still SHARE on twitter if your Canadian AT least I can share my clips via twitter an Im Canadian..

You can try linking on PC via the Xbox Console Companion app, or the Game Bar (Win + G). Just head over to Settings and click Twitter to link your account.

If this doesn't work, you can try deleting the link from Twitter's end by going to
More > Settings and privacy > Apps and sessions. Look for either
Xbox Game Bar or Xbox One Social and revoke access for these apps. By doing this, you're removing any Xbox accounts linked to your Twitter handle, basically starting off from scratch.

Hope this helps.

As far as I'm aware, there's no plans for a remote desktop application for Xbox of any series.

What the poster above is describing is Xbox Companion App control.