1. Dude really knows his stuff, tracks his macros, eats in a surplus, gets his protein and all. He does things 99% right compared to the average eat clean bro split gym noob.

2. He did calisthenics for 2 years probably with very good nutrition due to point 1.

3. If you made a video saying Lazar Angelov takes steroids, Lazar Angelov training won't ever give you his body, and show people true genetic max and how much insane hard work (cooking, calorie tracking, programming) it takes....... how much dislikes the video will get?

Just wondering, what are your thoughts on 40 and above?

That's cool. Do the both of you compete with each other? 
If size is your goal your rep work out should be more similar to a bodybuilder which means rep range of somewhere between 6-18 per set. Stick to those ranges but keep in mind that you need to keep building on intensity too, so keep progressing to higher variants of push ups once you reach the rep limit. You could also consider doing this if chests are your priority: Wide arm push ups, when the get easier for you spread your arms wider, a few inches till it get easy for you (only spread further when you can reach the rep limit). Eventually, after a while of training like this, you arms will be almost like 'T' or a cross meaning that they will not having the full ROM as a normal push up because of this your triceps won't be getting much use. So do note that you'd still need to a normal progression to build up your triceps. Consider this form of push ups a supplement to your training.

Don't forget dips too. Horizontal dips are great but requires great amount of strength to do.