First of all, improve your thumbnail to make it a bit cleaner and not too clutter (An example would be Triple Grenade Kill! Ring of Elysium, that is too much and it turn off viewer wanting to watch your videos) because the first things they see when they are searching for the particular video, would be your thumbnail. Reduce your video length to at least 10 minutes and avoid uploading 1 hour video (nobody wanted to sit through that unless they are your dedicated subscribers). If you want, upload it part by part instead. Just take a look at Rad Brad for example. Apart from that your video overall is good.