you cannot really base video time with amount of games, it is not so much a give away using one large video as having multiple per game videos --- if it was one big video it will prevent pre-recorded spoilers for people that cannot watch it live, and seeing how worlds is in korea this year no one in NA can watch the games live and i dont want the world games to be spoiled i want to treat the games like they are live to me when i watch them- and just LCS series games as well i dont want series to be spoiled at all, one large videos will prevent this
(at worlds group stages being 1 game at a time is slightly different, but i am obviously referring to not in group stages when games are actually in series matches)