Thank you for your comment. I believe this issue is related to my recording method. I recorded it using OBS, and the sound was included. It's unexpected to see video lag with this method, but there it is. :) Thank you for your advice.
@@ErmanTepe In obs if you go to your audio mixer, click the little gearbox icon for advanced properties then fiddle with the sync offset to your satisfaction. Do a clapping test at different values by doing small recordings and playback your results until the syncing is working right. Was making me pull my hair out a while back.