Instagram : IGTV (upload/Edit/Report)
Video Length
Videos must be at least one minute long. The maximum length your video can be is:
15 minutes when uploading from a mobile device.
60 minutes when uploading from the web.
Video File Type
Videos must be in MP4 file format.
Video Resolution and Size
You can upload a vertical video with an aspect ratio of 9:16 or a horizontal video with an aspect ratio of 16:9.
Videos should have a minimum frame rate of 30 FPS (frames per second) and minimum resolution of 720 pixels.
The maximum file size for videos that are 10 minutes or less is 650MB. The maximum file size for videos up to 60 minutes is 3.6GB.