> install handbrake > open handbrake > drag mp4 video file into handbrake > in summary tab, change mp4 to webm > go to audio tab, press button clear > go to video tab, change video encoder to vp9. if the file is above ca. 6 mb you have to reduce quality. click on avg bitrate (kbps): and type number 1000 for some reduction or 500 for major reduction. for larger files (1-2 minutes long) you wanna type 200-300 or so. gotta experiment a bit. > all done, click start encode > if your iq is above 100 you succeed and get a usable webm but if your iq is less, you will fail 4chan limit is 4 mb size and 2 minutes length. no audio webms are allowed on /pol/.
Gadsden