@gabi @meso .mkv or .webm file on your website, optionally in a HTML5 video tag (unfortunately that will refuse to play a .mkv, even though it can just fine), or upload it to a GNU mediagoblin instance; https://gnu.org/software/mediagoblin

If bandwidth is an issue, you make the videos available via bitorrent by adding a .torrent file for each video and let people seed the video for you.