need suggestions on vlog episodes

So i'm working on my vlog/youtube channel and hope to relaunch it next week

I have episode 1 scripted and currently working on scripting episode 2 I was looking the next few episodes after that talking about my race history and my original idea was breaking it into 3 parts with each part focusing on a different type of race I've done so it would look something like this

Traditional races 15
Obstacle races 8
Virtual races 15

If I spend a minute talking about each race plus and opening explaining what each race is and closing 2 of the videos will be close to 20 minutes long. Another idea I had was to break it down by years which would look like this

2013: 2 races
2014: 13 races
2015: 14 races
2016: 9 races

Since 2013 I only did 2 races I could explain what the 3 types of races are and still have a decent time then I wouldn't have to have that long of an opening for the other 3 videos which would give me a more decent time for a new channel.

What do you guys think I should do?

I don't feel equipped to advise you. You might just try picking one way, going with it, and then asking your audience for feedback that you can then adjust to.