MP4 is one of the popular and well-compatible video formats used by people today. According to the information I found on the Internet, a video in MP4 format has a smaller file size, but the quality is still excellent. If you don't have some special requirements for a video, it would be better to keep them in MP4 format on your devices. 

For iPhone users, the video taken by the camera is in MOV format by default. But don't worry, videos in MP4 can also be played. If you want to save videos to your iPhone, try to download MP4 files to iPhone. Here I will show you two ways to download MP4 videos to iPhone.

Part 1. How to Download MP4 Video to iPhone 

There are many MP4 video downloaders, online and desktop-based. For online video downloaders, Keepvid is recommended by most sites. I have tried it on my own, it provides lots of options to choose from for the exported video, including format, size, and quality. But there is frequent redirecting during the operation. I really don't like this as it seems to be risky.

For the desktop tool to download MP4 to iPhone, I tried EaseUS MobiMover. EaseUS MobiMover has a built-in video downloading tool, which is completely free to use. With this video downloader, you are able to download videos in MP4 format from 1,000+ sites, like YouTube, Instagram, Facebook, Twitch, and Dailymotion. Let me show this to you.

Step 1. Connect your iPhone to your computer, run EaseUS MobiMover, and go to "Video Downloader". Choose your iPhone as the target device to save downloaded YouTube videos.

Step 2. Copy the URL of the YouTube video, paste it into the bar, and then tap the "Download" button. 

Step 3. Then MobiMover will quickly analyze the URL and download the YouTube video to your iPhone. When it has finished, you can find the video in TV > Library > Movies on your device.

Part 2. How to Save MP4 Videos to iPhone from PC

If you already have videos on your computer, in other video formats, like wmv, mkv, avi, flv, and rm, you can also use EaseUS MobiMover to transfer them to your iPhone in MP4 format. The video will be transcoded to MP4 automatically during the process to transfer videos from PC to iPhone.

EaseUS MobiMover cannot only download videos via URLs, but also transfer videos from PC to iPhone. What else can this tool be used for? Let's check out its full features.

• iOS file manager - delete & edit items on your iPhone/iPad/iPod
• iOS data transfer tool - transfer files from iPhone to Mac or PC and the other way around
• iPhone to iPhone switch - migrate data on one iPhone to a new iPhone
• Free video downloader - download videos from Facebook and other sites
• iPhone data backup tool - one-click to back up your iOS data
• WhatsApp chats backup tool - back up, transfer, and restore WhatsApp chats

Step 1. Connect your iPhone/iPad to your PC and launch EaseUS MobiMover. To transfer AVI files from computer to your iPhone or iPad, go to "PC to Phone" > "Select Files". (Make sure your computer is trusted by your iPhone/iPad.)

Step 2. Select the AVI files you want to transfer and click "Open". Other video formats supported by MobiMover include MOV, MP4, M4V, MKV, RM, WMV, and FLV. (The video formats that are not supported by the iPhone will be automatically converted to MP4 during the transfer process.)

Step 3. After selecting the videos, click "Transfer" to start transferring AVI files to your iPhone/iPad. When it has finished, you can go to your iPhone or iPad to check and watch the videos.

The Bottom Line

No matter if you want to download a video from the web or PC to your iPhone in MP4 format, you can always take advantage of the tool EaseUS MobiMover, without any cost.