Growing onions from seed can be challenging. The seedlings are very vulnerable to fungal disease, and are pretty frail and delicate if you don't give them the perfect environment.
Not to worry, I have decided a 4step strategy that I can pretty much guarantee will work every single time if you follow it carefully and diligently.

00:00 Intro
00:40 The various ways to grow onions
01:09 Reasons to grow onions from seeds
02:55 Challenges of growing onions from seed
03:45 The 4Step Strategy