rays is the best :3

7:02: Get a buff here before leaving for the flank, then you could have probably killed that unbuffed enemy scout who was overextending.
7:26: You shouldn't be so deep into that choke ahead of your team, especially without a buff. Ideally your team should try pushing flank, since the choke on gullywash is such a nightmare. And if they are going to push choke, it should be a soldier leading, so he can use rockets to find traps like the one you almost ran into.

Not much to say about the rest of this round, it looks like the other team is really disorganized and your scout partner just kind of runs in and rapes them all.

9:19: What are you looking at? Their demo could be at choke shooting stickies at you right now, luckily he wasn't.
9:26: You shouldn't both be out here, both your scouts are disconnected from the rest of the team right now.
10:57: You're not going to get the medic when there's a soldier standing on the high ground staring at you like that. Just back up immediately instead of being indecisive and eating a rocket.
11:06: Your medic shouldn't be in lobby, they have uber advantage. The other team should have just built uber, popped straight into lobby and killed you all. No comment on the rest of this fight, both teams are just playing really disconnected and people are running around alone trying to be heroes. Somehow your medic lives to get uber and your team wins the round.

13:02: He's gone, it's too late, let him go.

15:03: Your team should have had this mid fight, but it seems an enemy scout came from behind at the last minute and killed your combo. You should have stayed on the point to protect your medic and cap instead of dropping down to fight that soldier who was backing out.
15:32: The other team won mid and has full uber advantage, so it's good that your team is thinking about forcing them at second. But you didn't even glance at flank, and a scout came and killed your medic.
16:26: I don't understand why the other team doesn't have uber here. I guess they got forced at some point off screen, in which case there's no reason for you to be out here going for a play alone. If they did still have their uber, you should have thought about staying at last and playing heavy, given your team's disadvantage.
16:58: You're overextending. You could easily have died pointlessly there, especially since you went in without a buff.

The main piece of advice I would give you is find better teams to scrim against. Your flaws don't really become apparent until you're playing against a team who can punish you for them.