What features should I look for in a TikTok video downloader?
我应该在 TikTok 视频下载器中寻找哪些功能？
Key features include the ability to download videos without watermarks, support for various file formats, batch downloading, high-quality video output (including HD and 4K), a user-friendly interface, and fast download speeds
主要功能包括能够下载无水印的视频、支持多种文件格式、批量下载、高质量视频输出（包括HD和4K）、用户友好的界面和快速下载速度。