Promoting video on Instragram that is longer then 1 minute

Hello boys and girls !!

I need heeeelp !!

I have a video that is longer then 1 minute (1 minute 30 second) and I want to put it on promote. Instagram doesn't allow me to promote IGTV videos.

I know that I can split it in two videos and then promote it but that doesn't work for me. It will interupt the video in middle.

Please help ! I worked on this video for ages and now I can't promote it.