Instagram is a great platform for sharing photos and videos. However, if you want to share high-definition videos, you’ll need to use the Instagram app’s upload feature. To start, open the Instagram app and sign in. Then, click on the three lines in the top left corner of the main screen and select “Upload.” Once you’ve uploaded your video, select “Share” from the menu at the bottom of the screen. You’ll then be able to choose how to share your video. You can post it on your account or send it to your followers.