Webmaster
This problem solved by software.
Every time you try to post/edit a message, and you embedd a video or audio or some other similar object, sofware will check if the first 20 letters of subject contain important words like [video] or [audio].
If not, software will automatically add [video/audio embedded] to the subject line.
Software does not differentiate between video objects or audio objects ... as both kind of objects can be rather large...
Happy new Year everybody!
Webmaster