Show video controls for Instagram videos

gistfile1.js

function mutateInstagramVideo(node) {
	node.querySelectorAll('video').forEach(video => {
		video.setAttribute('controls', '')
		video.nextElementSibling.remove()
	})
}

mutateInstagramVideo(document)

var observer = new MutationObserver(function(mutations) {
    mutations.forEach(function(mutation) {
    	mutation.addedNodes.forEach(function(node) {
			mutateInstagramVideo(node)
    	})
    })
})
observer.observe(document.body, { childList: true, subtree: true })