It may be, that after an upload via the WYSIWYG editor of Media Content, be it a picture or a movie, etc. appear as though uploaded and subsequently also in the CMS, but later in the frontend only a small red cross or nothing appears.
This may be because, that in the backend system under > Configuration > (Standardkonfiguration) General > CMS-Editor Optionen
There should be at “Use Static URLs for media content in WYSIWYG for the catalog” AND be. Then the static link of media content, which also means, that he always refers to the base URL and not the URL, for example. Stores one of the main installation.
However even then the base URL change, would be ALL media content to this new URL changed.
Used in Magento 1.4.1.1