Changes

* There are way to extract youtube videos, if the wiki had a place to store them we could keep them from disappearing, but that might be too costly.

* Related products might be a good way to add these. For example trailers of game could be added to the corresponding page, like adding the [https://www.youtube.com/watch?v=UHh1TxryWlw Vampire Coast trailer] to the Vampire Coast page in the lexicanum.