Why are my iPhone videos blurry when I send them via text (MMS)?
iPhone owners can now send multimedia messages between iOS devices using iMessage. This preserves the quality of recorded video in most cases, especially when sending an iMessage over a Wi-Fi network.
Sometimes when sending video to a non-iOS handset, or when iMessage is not available, messages are transferred using standard text messaging, or MMS (Multimedia Messaging Service). Unlike iMessage, which goes through Apple servers, MMS has strict size limitations.
Depending on the version of MMS being used, size limitations can be 300 or 600 KB. This means the video being sent will be compressed before transfer, reducing its quality. Wireless carriers can also compress the file before transferring via MMS.Depending on the capabilities of the device receiving the iPhone video, the transferred file can appear compressed, blocky and blurry after receipt. The best way to transfer video outside of iMessage is to use email, which will preserve video quality.