There are virus' going around at the moment so when you post links and youtube, can you please remove the http section...
eg......
https://www.youtube.com/watch?v=z3xOU2tLl7g becomes....
youtube.com/watch?v=z3xOU2tLl7g
and then if someone wants to look at it they can place a copy and paste of the lower into their browser and still find your resource.
I know this can be frustrating to some, but its a measure to ensure that the site and its members dont become corrupted with internet dangers lurking elsewhere.
Thanks for your patience and understanding.