In the iOS app, simply tap the comment and click delete…
…and for Android just swap the tap for a long press.
To remove a comment from the iOS version of Instagram, simply tap on the comment, swipe it to the left, tap the bin icon, and select Delete.
Twitter works in a slightly different way to many other social networks in that other users cannot comment directly on your posts, but instead can only reply via their own, separate post. As such, you cannot delete another users reply in the same you can on a platform like Facebook.
You can do this in iOS by long-pressing on the tweet in question to bring up the menu with these options.
In the Android app, click on the tweet in question, then click the options button in the top-right hand corner to open the menu.
Navigate to the comment you’d like to remove from a video, click the drop-down options arrow in the top-right hand corner of the comment, and then click remove.
