Remove media file names

Add below css code in Custom Css tab under rtMedia admin setting to hide media file’s name from media gallery:

rtmedia-container .rtmedia-item-title { display :none }

Add below css code in Custom Css tab under rtMedia admin setting to hide media file’s name from activity feed:

.rtmedia-activity-container .rtmedia-item-title, #buddypress div.rtmedia-activity-container .rtmedia-item-title { display: none; }