I've yet to learn to embed a link from android.
Grrr.. guess I'll just listen lol
Not sure if this will help, but, on my Linux systems (which is what Android is based on) when you highlight text it is automatically copied. If you can highlight a link, then just try pasting it. I've been tempted to try Android but have yet to take the plunge.
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Edit to add:
I searched for an answer:
Firefox for Android lets you easily copy and paste text directly from a web page. This article will show you how it's done.
Long-tap a word to select it on a web page.
Drag the set of bounding handles to highlight all the text you want to copy.
Tap Copy on the toolbar that appears.
Tap and hold on the field where you want to paste the text until a toolbar appears. This can be the URL bar or any text field.
Tap Paste on the toolbar.
Your copied text will appear in the field.
https://support.mozilla.org/en-US/kb/how-do-i-copy-and-paste-text-android
and then there is this:
[ame="http://www.youtube.com/watch?v=suMpg3OJYkQ"]Android 101: How To Copy and Paste - YouTube[/ame]