312 mp4 1920x1080 60 | ~ 37.64GiB 1797k m3u8 | avc1.64002A 1797k video only
299 mp4 1920x1080 60 | 15.81GiB 773k https | avc1.64002A 773k video only 1080p60, mp4_dash
617 mp4 1920x1080 60 | ~ 37.13GiB 1772k m3u8 | vp09.00.41.08 1772k video only
303 webm 1920x1080 60 | 7.19GiB 351k https | vp09.00.41.08 351k video only 1080p60, webm_dash

↑
これ何がちがうん？
容量とかビットレート全然違うし

https://www.youtube.com/watch?v=sOSInPCMJn0