So I thought I'd help some of the people here out who are unaware... I see it all the time and would love to give some of you a helping hand.
So we should by now all know how to upload a picture, right?

Some helpful advice- do not try and upload a picture from an email, either save it and upload directly, or save it and upload it to a site like imgur.com.
Now, so many times I see folks not know how to embed a video on here. So listen up! It's super easy:

^First, click this little guy... then paste the URL from YouTube (Ex: http://www.youtube.com/watch?v=UmzYR4IQ_kM), then click ok, and bingo! You have a video uploaded and embedded into the post! Not sure what video hosting sites are compatible with here, but I know for sure YouTube is.
Mods, feel free to fill in with any other sites that work on here.
Now we should all know how to share that awesome or funny video... (by the way, click the video link I used as an example if you want a good laugh).