all this advice comes from an average/experienced player. I aint no pro though. Don't feel discouraged because MANY if not everyone does these things when they first play.
I don't think that game was entirely your fault either.
thanks for uploading the vids to you tube.
Youtube 2v2 Ruins of Argus
CSM CL vs GK (Me)
IG: Inquisitor vs SM Apothecary? (Ally)
Things I noticed:
1. You don't use grid keys. You use the standard layout. Grid keys changes the keyboard commands you can use to create units, order units and use abilities.
2. You don't use hotkeys. For example, you seem to click on everything in a linear fashion. You can instead save time and mouse movement by using the keyboard to initiate commands and the mouse to aim. Instead of applying one action at a time you setup 2nd and 3rd commands if you press shift+(execute a command)
This will require extensive practice especially because you now have to memorize abilities to specific keys for each unit. Each unit is diff too!
For example, these are the first few things you did in the beginning of the game. You created the CSM. ( I couldn't tell if it was with the hotkey or mouse). If you did hotkey great! if not use it next time. After you sent CL and Tics to capture they had no follow up commands. This is why you see the CL and tics idling after completing their point capture.
You selected the CSM by using the group binding 3 and moved them to the forward line( GOOD!). In case you didn't know you can setup a rally point from the base. You can use that feature by selecting the main base and then either right clicking your hero or a unit or a point on the map. That way when your unit spawns it goes to that rally point.
It seems irrelevant in the first few minutes of the game. This type of stuff is CRUCIAL come t2 and t3 when units can literally be killed in 5 seconds. If you are spending 1 second or 1/5 of that time moving the mouse. aiming the ability. activating the ability and missing. Or in the same vein dodging an enemys tactics it could mean victory or loss.
after that you continued to individually click on a unit order them a command then click on another unit and give them one command and so on an so forth. What this doesn't take into account is that DURING that time you can have grenades thrown at you.. commanders suppress or control your units. or you could be walking into a trap.
try to move your army as a whole and during the engagement adjust individually and order commands then. If you for example ask a CSM unit to attack a unit. The moment that unit leaves the fog of war now or out of range your CSM are idle and or exposed. Which could be a wipe by melee squads being to close in or maybe a grenade toss you weren't expecting.
3. during the first few moments of the game when you are capturing. You don't have to hover over the CL and just watch him or any other of your units. Use that time to create units. Watch your teammate. Scout the map via audio clues or visual clues. I have this habit too of being a spectator. I am engrossed in what is happening instead of clearing my mind and realizing I should be doing something. I have to say it in my head over and over "what else could I be doing" until you don't say it you just do it. When you watch really good people play they are moving around the map SO much to get any info they can.
4. in the first engagement you can always force melee with CSM vs lighter ranged armies. For example, Storm troopers or guardians or scouts etc. You wont take much dmg if its a 1v1 fight and you can push aggressively until tactically its not your advantage to do so.
5. after the first engagement you sent a half dead CL and half dead tics to the middle. There was no urgency yet to HAVE to do that. Those are things you have to do when you are about to lose the game or its very close. Until you get better and can be more decisive about how you are going to re inforce you might benefit but putting your units on auto reinforce the moment they are spawned. You can do this by RIGHT clicking the green reinforce button. This will save you time until you are more experienced to decide if and when to reinforce them.
. I'll sum up: