Laggy video when downloading from m3u8 link with ffmpeg

Question

Im trying to download the video in this m3u8 link https://lbs-usp-hls-vod.cmore.se/vod/1aee4/l4fiymehvxx(13287875_ISMUSP).ism/l4fiymehvxx(13287875_ISMUSP).m3u8, and to do th