To create a video on Instagram with pictures and music, you will first need to open the app and sign in. Once you are logged in, click on the plus button in the bottom center of the screen to create a new post. Then, select the video option and click on the blue record button to begin recording your video. You can add photos and music to your video by tapping on the icons at the bottom of the screen.

There are a few ways that you can create a slideshow for Instagram. One way is to use an app like Slideshow or PicPlayPost to create a slideshow of your photos and videos. These apps allow you to add music, text, and filters to your slideshow. You can also create a slideshow on Instagram itself by uploading a series of photos and videos as one post.