That carb cleaning vid is so-so. You think he might take the time and trouble to learn what all the parts are and their names before making a video, lol. There's also a glaring omission. He makes no mention of the choke feed jet and cleaning it. If it's plugged, the choke won't work and the bike will be very, very difficult to cold start.
You don't need any octane booster, just use high test gas. Kick starting may be easier for the first start. You can try the electric start but don't run it for too long. The battery isn't very big and doesn't have much of a reserve. It will run down quickly with sustained, long engine cranking. If it gets low, there may not be enough juice left in it to power the ignition, so it may still crank but won't start. The starter is using all the battery power and leaving none for the ignition. So, as I said, you can try the starter. Give it maybe 3 or 4 short 5 to 10 second cranks. If it doesn't fire up, change to kicking it. If it won't start, make sure the choke jets are clear .....