Are you referring to text/videos within the Messages app or email messages? I've personally never seen an error when deleting text/videos. If you within the Mail application that would have something to do with the email provider itself. Let us know and we will try to help. Also, what is the error message you receive?
This is the message I get when trying to clean emails from inbox:
UNABLE TO MOVE MESSAGES
THIS MESSAGE COULD NOT BE MOVED TO THE MAILBOX TRASH
But sometimes it will delete anyhow when the message is showing??
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Message edited by Verizon Moderator