You can find film and television editing materials on websites such as Cainiao Gallery, Pexels, Pixabay, mazwai, and aigui.com.

1. There are a lot of high-definition, watermark-free video materials on the Cainiao Gallery website, including various types of nature, people, transportation, food, etc. The key point is that they can all be downloaded for free and can also be used commercially.

There are also a lot of audio materials, such as games, movies, animations, etc., all of which can be found here. The categories are very clear, and all can be downloaded for free.

2. Pexels is a foreign material website that mainly focuses on pictures and video materials. All the videos here are high-definition without watermarks and can be downloaded for free.

You can also get creative and edit pictures and videos however you like.

3. Pixabay, like Pexels, mainly focuses on pictures and video materials. All videos on the website are 4K high-definition without watermarks, and they are also available for free download and can be used for commercial purposes.

4. mazwai is a pure video material website. It has a lot of aerial landscape video materials, including people, nature, traffic, landscape, etc., and the categories are very clear.

All are in 4K and 1080P resolution, and can be downloaded for free for commercial use.

5. Aigei.com Aigei.com is a relatively large audio material website in China. There are 1.17 million sound effects in it, all of which are classified one by one.

Basically, it can be downloaded for free, but commercial use requires purchasing a copyright.