I have this requirement on embedding videos in Siebel email treatment or landing sites? Is this an out of box function? If not, what are the general steps need for allow user to use the WYSIWYG editor to upload the video?
CS as a marketing practice, its best to upload the videos to a secure website and embed links to the videos in the email.
If however embedding the video is the only way, attaching them to mail is perhaps the way you want to do it. Let me know if this helps.