Another good option is SendShort. You can import and edit videos from a variety of sources, including YouTube links. It has automatic format detection, cropping, subtitles and custom templates, so it's easy for creators to use. SendShort also has scheduling and management of social media posts, detailed analytics and support for more than 50 languages.
If you're looking for something more specialized, 2short.ai could be the way to go. It uses cutting-edge AI technology to pull out interesting moments from videos and create attention-grabbing shorts, with features like Center Stage Facial Tracking and One-Click Animated Subtitles. The service supports multiple languages and formats, so YouTube creators can easily convert long-form videos into short-form videos.