No, there isn't any video/instrusctions on how to that I have seen, but I figured it out.
It's a pretty easy process:

1. go to the "wallet" tab on your account.

• you can get to wallet from clicking on your profile pic/avatar on the top right when logged in

1. Click on the dropdown arrow next to the number on your STEEM POWER balances
2. Click Deposit
3. Select what you want to use (in this case BTC)
4. Copy the address beside the "send bitcoin to"
5. Take that address to your exchange (coinbase, bittrex, poloniex)
6. Send the amount of bitcoins you want to send to the address you copied from steemit.
7. After it arrives (might have to refresh a few times - sometimes is fast, othertimes it isn't) - be patient.
8. Copy the amount to deposited bitcoins and past it into the box under "estimate using bitcoin"
9. Click "Get Estimate"
10. Click "Update Estimate"
11. Wait until you see it says "broadcasted" under the Transaction History at the bottom

Let's Steem