You can try trimming the song at the start and end to focus on the best part, which might make it seem longer on your IG story.
You can use some apps or editing tools to extend the song. Some apps let you loop the part you want to make longer.
You can try using a third-party app that allows you to extend the duration of the song when posting on IG story.
You can try using a looping feature if it's available. Some apps or editing tools might have this option to repeat the song section you want to extend.
You can try using a longer version of the song. Sometimes, the original song might have extended or remix versions available.
You can incorporate more details about the song's background or the emotions it evokes. That way, it becomes a more integral part of the story and seems to last longer.
One way is to have the characters react to the song deeply. Maybe they start singing along or it triggers a significant conversation. Also, you could intersperse the song throughout the story at key moments to make it feel more prolonged.
One way is to carefully select a song that has a longer duration to start with. Also, you could repeat certain parts of the song strategically to give the impression of it lasting longer.
One way to make the story on IG longer is to break the main idea into smaller parts and explain each part separately. Also, you could include related photos or videos to enhance the story and make it more engaging.
You can try using apps that allow you to loop or extend the music. Some popular ones are InShot or CapCut.