Help With Agressive Territorial? Guppy

HI Just wondering if any one can help I have 4 guppys in my tank I think 3 male and 1 female, along with 3 platy 1 male 2 female and 5 neon tetra.
The problem is 2 male guppys are constantly chasing my platy to me it looks teritorial behaviour as my platy are orange and the guppy that are chasing are orange and yellow, is there anything I can do to prevent this happening I feel asif it is stressing my platy I have 4 platy fry and one guppy in a hatchery in the tank. My tank has some hiding places but I was reading I should put some long grass and some hiding spots up high as they like to be at the top of the water. It is a 70 litre tank, is what I have in the tank over populated? And there is not enough territory for the fish. I would be grateful for any input also I will attatch a video down below so you can see the tank and what is going on. Thanks for your help

 

It should be enough room for each to have their territory. However, adding some tall thick plants will help. It cuts off line of sight for the fish near the top which allows the fish to ignore each other better.

 

I will look into some long plants thanks is there any you would advise

 

Apongonten are good because the grow tall fast. Though you need to add fertilizer root tabs to keep them healthy because the grow fast at the beginning because they're a tuber. Once the tuber nutrients are used up, it can go dormant or die unless you give it enough nutrients to replace what it's used.

I've heard anubias grows tall fast bit in only have the anubias that grows horizontally.

I know several people in the forum really live water wisteria.

 

Thanks a lot I went to the pet store to see what they had I could only see Java fern I have planted that hopefully this helps I will update over the next couple of days