Link to the 1st clip - Link to the 2nd clip -

I was told that the 1st will possibly considred as a MG since it might be considered bench sotrage?

Both of these clips actually give you bench storage, which is a major glitch. The second cancels it using a fireball; you can actually move all the way up to the transition before fireballing. Regardless, both of these are intentionally gaining bench storage, which is major & disallowed.

You should not sit at the bench at all if you are doing this early control, but ultimately I'm not aware of any runners who go for this, as the inventory drop is inconsistent and losing 1hp for the next segment (assuming any%, so onto WK) is almost universally not worth.

Without benching I was able to get around 0.8s timesave over the normal strat for a 1hp timeloss, though saving this much time requires a 1st try inv drop out of a dash from the seal, which I was not able to get consistently on 1.4 (and would be impossible on 1.5).