I haven’t played the super characters enough to give much character specific advice really, but here’s my take anyway:
Gonna start from second round as you didn’t really do anything first round
0:51 - going for s.hp at the start of the round is never a good idea, it’s too punishable and Seth can’t afford to take chances like that (and j.hp punishes most of what s.hp punishes and more anyway), also I don’t understand the 1 second gap of no movement before hand.
0:56 - random guess srk is easily punishable and quite a bad idea here, as you find out a second later
1:12 - use a blockstring, I really don’t believe you hitconfirmed that
1:16 - I guess this was a mistake but you shouldn’t have walljumped here as firstly you had a 100% unpunishable free stomp you didn’t use, but then the divekick at the end would of put you at frame advantage still and Seth as a character is all about momentum, you really can’t afford to give up opportunitys like that! Especialy as you didn’t look comftable zoning guy, you would have never managed to take 80% of his life without him hitting you.
1:20 - low block more
1:42 - ?
1:46 - you had the advantage here but just blocked and let him try and get in on your still
1:48 - low block more
1:54 - low block more
1:56 - random wakeup dp was a bad idea
1:58 - low block more (seriously, his slide is free ultra or non-c.hp combo)
2:04 - commentator is a moron
2:12 - bad spacing, seth has awful sb recovery
2:49 - s.hp at this range is never a good idea, if you want a poke use s.hk
3:04 - commentator is a moron
3:04 - could have punished with ultra
3:06 - j.mp if anything here
3:07 - low block more
3:10 - lp.srk > stomps reset OR ex.srk > ultra 2 OR if you want to kill him and forget about your meter ex.srk > ex tanden > c.hp xx lp.srk > ultra 2
3:19 - I guess you could have hp.srk FADC ultra2 here for the kill
3:21 - commentator is a moron
3:24 - shouldn’t have done that, punishable
Misc. advice:
hp.srk FADC sometimes
spd more, it’s one of the main reasons seth isn’t just some third rate akuma
try and work out better when you can and can’t tanden
try and get better timing on j.hp instead of just throwing it out when you jump
be more (smart) aggressive, a lot of the time it seems you would just play defensivley until inevitably guy would get in and damage you.