I drove home in my '08 R56 Mini Cooper (no S) 2 days ago and parked, everything was fine.
The next morning I try to start it but it will not crank or start. When inserting the key the dash illuminates, the lights turn on, everything appears normal. When pressing the starter button I hear an "electrical hum" noise and then nothing. No clicking noise, no engine turn.

Here is what I tried so far:

• I figured it may be the battery so I took it out and charged it for a few hours. Put it back in later, exactly the same situation.
• I checked the clutch pedal switch but it seems fine. I disconnected and reconnected the little plastic slider on the side that holds the wire connector.

I appreciate any help! Thank you!

Here is a video of what is happening:

 

When you touch the Start button, it seems like the clutch pedal switch is not working: You can see how the gas tank status is "filled" just like when you touch the Start button without pressing the clutch.
Are you pressing it in the first attempt?

Later it seems it is the battery or the starter.
I would try changing the battery with another one (just for testing, for example with the red Mini in front of you) and not just charging the current one.

Let us know

 

Yep, I would suspect the battery as well. Let me guess, is the original battery?