Here is a general video on the process to make Lavender Oil.
It is important to note that for every kilogram of pure lavender essential oil that is produced, an estimated 10-100 kilograms of synthetic lavender oil is made. Adulterated oils that are mixed with synthetic extenders can be very detrimental, causing rashes, burns and skin reactions, besides being devoid of any therapeutic effects.
This is why it is so important to purchase oils from a reputable company such as Young Living.
I choose to use Young Living because of their Seed to Seal guarantee.