: Standard text messages typically limit video files to 3.5 MB .
If you want to send an MP4 file as a text (SMS/MMS) or through a messaging app: 18521mp4
: For larger files, it is often better to upload the video to a service like Dropbox or Google Drive and share the text link instead. Direct Messaging on TikTok : Standard text messages typically limit video files to 3
If "18521.mp4" is a video you want to share with someone via text/DM on TikTok: 18521mp4
: While viewing a video, you can tap the Share button (arrow) and select a friend from your contact list to send it as a message.