Can I convert .h261 videos to .mp4 format.
Converting H.261 Videos directly to MPEG-4 Videos (.h261 to .mp4 conversion) should be possible and quite straightforward, even though your options are limited.
Use a video editing program or (online) conversion tool, such as the Freemake Video Converter or FFmpeg, which should allow users to import H261 videos and export them in MP4 format.