Instagram allows users to share square photos and videos that can be edited. Posts can be viewed by followers or publicly depending on privacy settings. Users can like and comment on other posts. YouTube is used to share videos that anyone can view unless the settings are changed. There is no time limit for uploads. Snapchat allows sharing of photos and videos for 1-10 seconds that self-destruct after being viewed once, or sharing to a 24-hour story viewable by contacts. Captions and replies are also features.