A possible concise summary is:
The user watches some of his old videos on YouTube and reacts to them. He comments on how he has changed over the years, how his channel has grown, and how he feels about his content and his audience. He also shares some anecdotes and memories from his past experiences. He thanks his viewers for their support and expresses his love for YouTube. He ends the video with his signature outro.
Here are the key facts extracted from the text:
1. The speaker, Jacksepticeye, is reacting to his old videos.
2. He did a similar video 2 years ago when he had 200,000 subscribers.
3. Jacksepticeye is watching a Minecraft video, despite many people thinking he hates Minecraft.
4. He made a series called "Survival Hunter" which was inspired by Bear Grylls.
5. The first episode of Survival Hunter was in Far Cry 3, and he also did episodes in Skyrim and Minecraft.
6. Jacksepticeye's internet was terrible when he was recording his early videos.
7. He had to download games overnight because of his slow internet.
8. He recorded a video of The Last of Us, which he had been anticipating for a long time.
9. He bought a PS3 just to play The Last of Us.
10. Jacksepticeye's channel grew from 1000 subscribers to 10 million subscribers in 3 years.
11. He recorded a vlog called "Going Back To My Old House" where he visited his old cabin.
12. He started going to conventions in March 2015, where he met huge groups of people.
13. Jacksepticeye's channel went from 2 million to 6 million subscribers in 2015.
14. He thinks 2015 was one of the greatest years for his channel.
15. He wants to go back and watch his old videos to understand why people liked his commentary.
16. Jacksepticeye thinks YouTube is a great way to understand oneself and to cope with life.
17. He is proud of his channel's growth and is grateful to his viewers.
18. Jacksepticeye's old intro was "Hey guys, what is going on".