If you want to strip subtitles out of your videos without losing any of the video quality, GhostCut is a good option. It can automatically remove text, delete hardcoded subtitles, and rebuild the video, all of which can save you up to 95% of the time. The service scales by video length, and it's got a free version with some useful features, so it should be useful to creators with modest needs.
Another good option is Vtopia.ai, which offers text removal powered by AI specifically for stripping subtitles out of videos. It's part of a larger collection of services that includes language translation and face-swapping tools, so it's a good choice for content creators trying to reach a broader audience. Vtopia.ai offers a free service to translate your first video, so it's a good starting point if you're new to the service.
If you're looking for a more general-purpose media processing service, check out Media.io. It's got a range of AI-powered tools, including an Auto Subtitle Generator and a Vocal Remover. Its drag-and-drop interface is easy to use even if you don't have a lot of technical expertise, so video editing is accessible. It handles MP4, AVI, MOV and other formats, and it's got a free version with limited features.