I'm unfamiliar with apps & smartphones. I like e-mailing video messages. Normally, either I send as attachment or host on a server for download. How can I send to smartphones? I use a desktop computer and other family members use smartphones. I would appreciate being advised of format(s), size limitations if any and method of delivery. So far, my attempt to send my aunt an attached video to her gmail acct only allowed her to hear the video on her Droid X2 phone. No picture. Thank you much!