Django - handle two form elements for the same model in one template - django

Question

I am using the following UpdateView in order to alter some values in the database:
class MyUpdateView(UpdateView):
model = MyModel
fields = ['VideoURL', 'MainDescription']
template_name = 'myapp/edit.html'
This is my template:
<div class="row">
<div class="col-12 col-lg-7">
<form method='post' class="card shadow-soft border p-4 mb-4">
{% csrf_token %}
<h5 class="mb-4">General</h5>
<div class="form-group">
<label for="MainDescription">Title</label>
{{form.MainDescription|add_class:"form-control shadow-soft"}}
</div>
<div class="row">
<div class="col">
<button class="btn btn-primary btn-dark mt-2 animate-up-2"
type="submit">Update</button>
</div>
</div>
</form>
</div>
<div class="col-12 col-lg-5">
<form method='post' class="card shadow-soft border p-4 mb-4">
{% csrf_token %}
<div class="form-group">
<label for="VideoURL">Video URL:</label>
{{form.VideoURL|add_class:"form-control shadow-soft"}}
</div>
<div class="row">
<div class="col">
<button class="btn btn-primary btn-dark mt-2 animate-up-2 text-right"
type="submit">Update</button>
</div>
</div>
</form>
</div>
</div>
However, I am facing some difficulties doing so because although both fields belongs to the same model, I cannot update any of the information. What I have noticed though is that if I place the both fields under the same HTML form, it works:
<div class="col-12 col-lg-5">
<form method='post' class="card shadow-soft border p-4 mb-4">
{% csrf_token %}
<div class="form-group">
<label for="VideoURL">Video URL:</label>
{{form.VideoURL|add_class:"form-control shadow-soft"}}
</div>
<div class="form-group">
<label for="MainDescription">Main Description:</label>
{{form.MainDescription|add_class:"form-control shadow-soft"}}
</div>
<div class="row">
<div class="col">
<button class="btn btn-primary btn-dark mt-2 animate-up-2 text-right"
type="submit">Update</button>
</div>
</div>
</form>
</div>
What am I missing here? Can anyone give me a hint? Thanks
Edit
It's due to how the forms are being displayed in the HTML form. They should be independent: