What is a good codec to render to for rough work?


Hello. I want to use Natron to do a lot of private experimentation, meaning that I foresee myself producing a lot of bits of video only for my own use, for which technical quality is not so important. I am trying to find the right codec to use for rendering these clips. My main requirements are that the bitrate be very low (to save on disk space) and that a preview thumbnail be shown in Windows Explorer so that I can easily browse a large number of such files. I tried quite a few codecs but the export file size is too large. The one I tried that did produce a very small file was one of the AVC codecs, but Windows Explorer didn’t make a thumbnail of the file. Does anyone have any suggestions for a suitable codec?