Embed media iframe style

[350d]

Title
Embed media iframe style

Short, concise description of the idea
reset margin and padding for embed media iframe source code or add custom css settings for this iframe.

Full description of the idea
Hello!
Source code for embeded media iframe now is:

===========

MEDIA CODE HERE

=========

this code is not valid and make additional paddings to the entry content
An ordered list of benefits

• please, make valid code for embed media ifrime source
• reset margin and padding for iframe source code body and html elements

An ordered list of problems/issues involved

• additional paddings in iframe with embed media