这个扩展内置了视频格式转换的功能，但最终文件有水印，所以尽量下载MP4文件，没有的话再考虑FLV文件。

The extension provides a built-in method for converting video files, but they will end up watermarked, so just download the files in MP4 if possible, or FLV if not.

youdao

如果你用YouTube Downloader或都抓取视频的站点的话，你可以下载和转换一步完成。但是你在别的地方下载的可能就需要了。

If you're using the YouTube Downloader or one of the video ripping sites you can download and convert in one step, but if you downloaded from elsewhere you will probably want to convert them.

youdao

我先是转换了这些视频文件并使用一个FTP程序将它们上载到我的远端站点，然后将它们下载到我计算机上的视频播放器。

I first converted the video files and used an FTP program to upload them to my remote site, then download them to a video player on my computer.

youdao