First stuck was 3:30 than i get 4:30, beat 5:00 was impossible me! but managed 5:01 and 5:11 but my best 5:01 ..every person has very dif ability but easily i can say for 5:00 is a big barier you must break or beat in your brain first ..breathold comes later...i believe i turned the first page but stuck at second page

Meanwhile lung capacity of Tom Sieatas just 6.8l ..he can hold 9+ or 10+
From jump 3:41 to 4:30 answer is to find out the right breathup cycle before big hold(4:30) ..