I tried that tutorial before and ended up breaking the bezel screws. I would not follow that.
Here's the series of steps I use. The crystal is not tight and with care it's very easy. I would not remove the bezel. The risk of damage is a lot higher.
Step 1: Remove case back (6 screws)
Step 2: Remove the movement holder tabs/screws
There are 2 holders. (V2's don't seem to have them though)
Step 3: Remove stem
Remember this is a 7750. To remove the stem push the crown all the way in (winding position), push the stem release button (gentle), pull the crown.
Step 4: Remove the movement from the case
Gently turn the case around and take the movement/dial/hands out.
Step 5: Push the crystal from the inside
This part you can do with your hands
Step 6: Install the new crystal
You can do it without a crystal press but I'd suggest you get one. This is a flat crystal so it's not that hard. You just need 2 flat surfaces (one to put the case the other to push the crystal).
Step 7: Reverse the early steps