There are a few ways to download videos onto an iPhone. The first way is to use the built-in video player on your iPhone. To do this, open the app and select “Video.” Then, select the video you want to download. The next step is to choose “Download.” After clicking on the link, you will be taken to a page where you will have to enter your Apple ID and password. After entering these information, you will be able to click on the “Download” button.