The problem with links to videos is that the videos themselves exist on an external site and can be taken down at any time. In that case, the answer becomes silently broken without us knowing about it.
For this reason, we don't treat posts such as "Your answer is here: <LINK>" as valid. Links to videos and other resources are fine and desired, but they need to exist with either a text explaining the answer or an image uploaded directly to TibiaQA (not a linked image).
In other words, if we were to strip all the links from the answer, it still needs to make sense.
Hope this helps!