Inconsistent and broken query-index

[kronnox]

There are currently multiple inconsistencies or errors in our index (and/or the source page metadata it was generated from):

• [ ] The sheet names should correspond to the media type name e.g. shared-blog should be shared-blogs
• [ ] The media-type column is missing the media type on a lot of pages especially infographics and info-sheets
• [ ] The media-type for videos is lowercase while the media-type for everything else is capitalized-case. This should be consistent and I would argue lowercase would be the better choice here; this way the case can be easily ignored for search and filters.

[jindaliiita]

@dkuntze Can you please check if this issue is relevant or not because i am not sure about the exact case for which this issue was created.