MP4 videos can be embedded in a text box using the Rich Text Editor. Other file types that can be embedded in a text box are .FLA, .F4V, .3GPP, .M4V, or .MOV files.
In the text box, position your cursor where to embed the mp4 video.
Select the Insert/Edit Movie button.
The HTML 5 video properties dialog box will appear.
Select Browse Server.
Select Browser Server button to display the Entity Picker dialog box.
Select the Upload file icon.
Drop files or paste URLs or clipboard images.
Or, choose Select files.
An upload file dialog box will appear.
Locate and select the mp4 video file that you want to embed in the text box.
Once the file is located and selected the file, select Open to upload the file to the site.
The file will upload to the server. This may take a while if it is a large file.
Select OK to embed the video on the page.
Once the file has finished uploading, it will appear in Resources and will be selected by default. Select OK to add the video to the Rich Text Editor.
Select OK to continue.
View embedded video file.
The embedded video will display as a placeholder in the Rich Text Editor box editing view.
Select Save.
Select Save button to apply changes.
View embedded video.
When the text box is posted or saved, the video player will display on the page.