Popular Media Source
Popular Media Source is available by default in the Midrub SmartRepost app. It provides popular medias from Instagram based on the Instagram's hashtags.
You can enter only one hashtag. You have to ensure the hashtag is available. But the app will show anyway an error if the hashtag is not available.
The Popular Media Source could return up to 10 media(photos and videos). You can use them to repost where you want.