Just a thought, but there is nothing particularly special about that bike in the video, and your bike is unique and appears to have been thoughtfully modified. I would be tempted to rebuild the motor, take care of any consumables such as chain, cables and tires and ride the thing. An F tank and suitable seat might look nice but I's avoid changing anything substantial until you have chance to ride it and see how it works.
If you would prefer to have a bike more like the sample, maybe it would be better and cheaper to sell what you have and buy something that will take way less work to get it to look like that.