How to Download Instagram TV (IGTV) Video?
1) Go to the IGTV post you want to download from the Instagram app.
2) If you are using an iPhone, click (⋯) at the bottom of the screen.
3) If you are using an Android, click (⋮) at the bottom of the screen.
4) Click on the “Copy Link” option from the opened section.
5) Paste the link you copied into the IGTV video box and start the download.