Let me phrase it this way: one would expect that the class of file formats for subtitles are easiest to handle (as opposed to say, the class of file formats for

Let me phrase it this way: one would expect that the class of file formats for subtitles are easiest to handle (as opposed to say, the class of file formats for images or videos). On the other hand, images and videos are likely to be handled using some library, which might be better at safely handling the files.