Yeah it took me forever to start "clicking" as an adc. Granted sometimes i still feel like i have no idea what im doing, but it has definitely gotten better. much easier in higher mmr because supports just carry my butt to mid game and late game teamfights where i know i can dominate. silver was so hard for me as adc so i played vi till i got out. (note the following is completely observation and/or suggestion; from what i can tell your mindset is on the right track, not that i am one with the credentials to judge)
tbh its easier to do what you did in your video to graves since he has a low range. better caits will trade the heck out of you and you will have to adapt your playstyle accordingly.
as you rise in mmr and rank try to focus more on cs. I doubt you'll ever get 15 0 1 in a plat or diamond game as well (still watching your video as well so forgive me if you did farm well). also be careful of heavy harassing because losing too much mana means a free kill for jungle should they see you playing crazy aggro. however, in this case since you were dominating your lane and their was an enemy ww who has bad ganking potential till 6 maybe pushing to tier 2 tower mightve been better. just ask your jung to come with you bot side enemy jung then you ward that side of the jungle up and if need be you 3 v 3 them which you should win if you are dominating. I feel pushing to the tier 2 tower is harder at 20min+ with only you and your support so at around 10min pushing to tier two isnt too threatening unless you see enemy mid roam down.
also ~9min you took tower. not always the best idea. If you are dominating your lane you may wanna keep it up to keep the wave around river midway through the map and just zone the enemy bot lane. then you have 4ish kills and out cs the enemy adc hard in both levels and gold. Its good that you roamed after but sometimes roaming too early causes people to get less farm in the long run. games i have ~20 min of lane phase i almost always have or get around 200 cs by 25-30 min on most games. however, if i take turret it seems harder to control my farming later on ( i get distracted by the aram mid lane mentality teamfight phase).
you'll see the zoning technique in higher mmr games like ones that are featured in the client. watch a cait game to look at harassing and the zoning she does. then apply this zoning control when you get 1-2 kills up in your games even if you aren't a caitlyn. Ive noticed that when i would go hyper aggro when i first started ranked I got ganked constantly. There would ALWAYS be 4 enemy champs at bot lane after like 9 min or so if i was playing really aggro. I have started to balance my wave control and my heavy harass to keep me safer. you seemed to be essentially zoning when you were harassing the graves but in other matchups or against/with other supports may make it harder to do.
ex: https://www.youtube.com/watch?v=8WvOq1urZ7c
I saw you use tristana jump aggressively when you were ahead in lane. very good. sometimes lower mmr plays too passively when they shouldn't (myself included).
1650 not good to get charmed like that. much better to play it safe and wait for the next wave. as adc you have to play like a pansy once the teamfighting starts especially if you are the one with the most kills/gold. I seem to notice this alot when i play as adc against malphite because malphites always seem to save ult just for the adc. if i was that ww at that point i woulda waited till you attacked turret like that and ulted. i wouldnt even care if i died cuz the shutdown and objective control we woulda got after woulda been insane with you off the map which would be when the enemy team coulda got back into the game if they even had a chance at all.
Playing patiently as an adc and yet aggressively is the hardest thing about adc imo. A game like this is easier watch and understand what you did well, but when the game is more even mistakes are much easier to notice.
Overall, very good mindset and core philosophies. I think there is improvement in many things, but as an adc the most important ones i see that aren't in the video or at least mentioned are positioning, zoning, wave control, when to back, itemization (goes hand in hand with backing), and many little things such as walking to edge of fountain when you shop. Also, learn to attack move to get better at kiting and prevent needless trade damage by accidently walking forward when csing.
wall of text op
tl;dr i thought it was good, continue to play adc and you will surely rise!