How long did it take to grow the channel to 1000 subscribers?
Can't remember really, but I'd say 4-5 well-made videos.
What gear do you use?
Sony A7iii with Sony G-Master 24mm f1.4
Rode NTG-3 boom mic
Rode Wireless Lav
Final Cut Pro + After Effects
Where do you get inspired to create new content?
Youtube and the news :)
What was your biggest lesson learned from creating videos?
For tech startups, Youtube is not a good idea in the early stage: it's expensive to produce content and you might not see results for months. In the early stage, you need customers fast, and Youtube is unlikely to bring them for you.
When you decide to go on Youtube, get started ASAP: your first videos will suck, but you will learn so much!