Here's an excellent video of harvest and tea manufacture from the Uji region of Japan.
You will travel from the countryside to the city, from the Uji river and fields to the factory. You will see traditional harvest by hand and machine harvesting of the leaves.
Touring a large factory, you watch sincha (Japanese Sencha) leaves being cleaned, tossed, steamed, dried, rolled, dried again, rolled again, dried again, and stored in bales at low temperature and humidity.
You will also see the Tsuen shop, the oldest teashop in Japan.
Here are links for two longer tea videos:
Matcha is made from specially selected, shaded tea leaves that are then ground into fine powder. It can take an hour of careful grinding to make 40 grams of matcha powder. This is the famous green powder used in the Japanese Tea Ceremony.
You can see the special bamboo shading that is required to make matcha and gyokuro in Japan in this video:
In another video, you can visit a small family factory in Shizuoka, Japan. This is a charming film, and you share a cup of their special brew with them at the end:
Here's a video showing how they make Lu'an Melon Seed in Anhui, China.
You will see the leaves harvested by hand, cleaned and sorted, the leaves removed from the stems, then dried in a large wok-like pan using a small broom.
The leaves are processed one small handful at a time.
Tea Videos: Brewing and Ceremonies
Here's a nice video showing how to brew Pi Lo Chun or Bilou Chun from JiangSu province in China: