MaxNumberOfVideos.swift

func removeVideoIfMaxNumberOfVideosReached() {
        if popupVideosDict.count >= maxVideosAllowed {
            // remove the least recently used video
            let sortedDict = popupVideosDict.keysSortedByValue { (v1, v2) -> Bool in
                v1.timeStamp < v2.timeStamp
            }
            guard let videoId = sortedDict.first else {
                return
            }
            popupVideosDict.removeValue(forKey: videoId)
            deleteVideo(ForVideoId: videoId)
        }
    }