Google has released a new update for the YouTube app for Android devices with a capability to trim videos before uploading to YouTube.
Select a video from the phone using the YouTube app and it will show you the new trimming interface. With that, the users can simply tap and swipe the scroll switch to choose an exact frame.
With new scroll switches you can now select the precise frames as start and end of the video. Not only that, you can also watch the video preview of your trimmed video before uploading it to YouTube.