Metrix

How do I post the crash report

So I'm pretty new to the modding scene, let alone Minecraft in general. Ive installed optifine before and it seemed to have worked okay but that was a while ago. ANYWAYS, I'm trying to install flans mod and I've got through most of the installation process (I'm following this guide: https://youtu.be/ZC5FYqogi74) until I get to the part where i open the Forge profile (5:36 in the video https://youtu.be/ZC5FYqogi74?t=5m36s) and Minecraft opens for a split second, then crashes. The launcher pops up and will give me this error: So I'm really confused on what to do and some help would be very much appreciated.