If you want to try this yourself, please take photos and let us know how it goes. Note that most watchmakers (myself included) charge more when someone brings us a bag of parts after a failed DIY attempt.
So few things on that video - you don't need to remove the bezel to change the crystal. Secondly, he's used the case back gasket over again, and these hard plastic gaskets are meant to be one use only items. This is demonstrated by he fact that he pressed the case back on with his thumbs - that means the gasket is way too loose as it should require a press to install. I would not trust that watch to be water resistant after removing and replacing the case back without changing the gasket.
The press you use will determine your success when installing crystals, and even he admits his press caused him troubles. You need a very precise press that keeps the dies parallel under load. Here's mine being used to install an acrylic crystal:
You might be able to get a watchmaker to swap the crystal for you, but since watch repair is like a game of tag (the last person to touch the watch is it and now responsible for anything that may crop up after they work on it, regardless if it was caused by them or not) you will likely be told that there would be no warranty, if they agree to do it.
Good luck.
Cheers, Al
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