Write
- Code:
[youtube]link[/youtube]
as shown here. As much as I know, this isn't shown properly in the mobile version but if you write that then you can easily share links without the need of going to YouTube. Unfortunately, as I've seen you've been trying to use a mobile link from YouTube, this won't work with this command.
Write the first part of the command then Copy and paste the desktop link I've provided in my post on top of the playable video followed by [/youtube].
Sorry if it's abit confusing, I'm not very good at giving clear, thought-out instructions.