Is there anywhere a easy to understand mining guide?
Not sure how up to date it is, but have you had a look here?
How to mine Cuckoo 30 using Grin
This is a brief guide on how to configure mining at production-level Cuckoo 30 in the current master version of Grin, (i.e.) Testnet2. If you have the hardware and you’d like to help with mining testing efforts, want to get a sense for what mining will be like on Grin’s mainnet, or just want to learn more about mining in Grin, then this guide is for you.
Building Grin
The first thing you’ll need to do is build and run grin. Follow the instructions for installing…
Tried it twice yesterday but just doesnt work…
Is there some sort of video guide?
No video guide as I know of yet, but if you jump on the Gitter channel and describe your issues in detail you might get some help. People are very friendly in general.