Call Lightning targets area, then caster choose point in that area and anybody in 5ft radius of that point is damaged, then on each turn caster can use action and choose another point for another lightning.

Casting it through glyph of warding has the benefit of not using concentration and getting whole 10 minutes (100 turns) of duration. But would it work?

Glyph of Warding works with spells that target area by autotargetting the area centered on the triggering creature - that's fine, the cloud appears above an enemy. But then what happens - would glyph also choose the point in that area to target that enemy? Would the glyph do it every turn? What if the enemy that triggered the spell died on the second turn and there's still 98 turns more of the spell duration - would the glyph target another enemy?

Or maybe since the caster is still "me" - I get to choose the points where the lightnings fall each round?

The Call Lightning spell targets an area, then the caster chooses a point in that area and anybody within a 5-foot radius of that point is damaged. Then on each of their turns, the caster can use an action and choose another point for another bolt of lightning.

Casting it through a Glyph of Warding has the benefit of not using concentration and getting a whole 10 minutes (100 turns) of duration. But would it work?

Glyph of Warding works with spells that target area by autotargetting the area centered on the triggering creature - that's fine, the cloud appears above an enemy. But then what happens - would the glyph also choose the point in that area to target that enemy? Would the glyph do it every turn? What if the enemy that triggered the spell died on the second turn and there's still 98 turns more of the spell duration - would the glyph target another enemy?

Or maybe, since the caster is still "me", would I get to choose the points where the lightning falls each round?