Thanks for uploading. I enjoyed watching this team game.
When you are the pocket player like that, your flanks are protected to some degree by your allies so you can focus on building up a much stronger economic base before fighting. This makes you more useful to your team in the later part of the game. You stopped creating villagers at around 50 or so which meant you were unable to support a large continuous supply of military units. I would recommend that you keep building villagers once you've reached the castle age until you have over 100. You can do this fastest by creating them simultaneously from 2 or 3 town centers. Use the "H-C" keyboard shortcuts to select a town center and create a villager. These TCs can double as adhoc defense structures against early attacks and resource drop off points for all the wood and food you'll be collecting. Surround each TC with a tight group of farms and have a good percentage of your villagers cutting wood to support them.
In the imperial age, when your gold mines start to give out, build up around 5 trade carts, research Caravan (to make them move twice as fast) and then build about 10 to 15 more. This will initially cost quite a bit of wood and gold but will allow you to generate sufficient gold from your partners' markets.
There are lots of other tips and ways to effectively use your army on this site. Eventually learning which units get attack bonuses vs. others will help you fine tune your game. But overall, "booming" up to over 100 villagers will help you the most in team games like this.