MOV in, MOV out, unless you ask
By default ToolGPT keeps the container you gave it, so a MOV comes back as a MOV. Inside, the video is encoded as H.264 and the sound as AAC. The plan names this as "MOV · H.264", so you know what you will get before you start.
If the file is going to someone on Windows or Android, or to a website's upload form, an MP4 is often the simpler choice. Say "compress it as an MP4" and the plan changes to MP4 with the same codecs. WEBM and MKV are also available.