Exception Value: Cannot use None as a query value Django Framework - python-3.x

Question

Help required, please.
I'm doing a level 6 Diploma in Software Development. Right now I'm doing a project that requires a gym app to be built.
We've decided on using Python/Django as our language/framework.
I have my models, urls, views, and templates working thus far. (Videos display and its own page)
However, I need to implement a search bar to search both video content and text context within the app.
I have the video model set up in /admin. migrations are done.
Do I need another model to search for normal content in my app?
The search bar is in my base.html template.
I want to use the search bar to do a query and pass the results onto a results template page
which extends base.html.
The error I get is the below;
Exception Type: ValueError
Exception Value: Cannot use None as a query value
Can someone point me in the right direction? photos of code attached.
base.html
<!-- Navbar Right Side -->
<div class="navbar-nav">
<form class="form-inline my-1 my-lg-0" action="{% url 'search_results' %}" method="get">
<input name="q" type="text" placeholder="Search" aria-label="Search">
<a class="btn btn-secondary my-2 my-sm-0" href='/gymapp/videos/' type=submit>Search</a>
</form>
<a class="nav-item nav-link" href="#">Login</a>
<a class="nav-item nav-link" href="/register">Register</a>
</div>
search_results.html
{% extends "gymapp/base.html" %}
{% load embed_video_tags %}
{% block content %}
{% for i in obj %}
{% video i.video 'tiny' %}
<ul class="list-unstyled mt-3 mb-4">
<li>Name: {{ i.video_name }}</li>
<li>Description: {{ i.content }}</li>
</ul>
{% endfor %}
{% endblock content %}
urls.py
path('videos/', VideoResultsView.as_view(), name='search_results'),
models.py
from django.db import models
from embed_video.fields import EmbedVideoField
class Video(models.Model):
category = models.CharField(max_length=200)
video_name = models.CharField(max_length=200)
content = models.CharField(max_length=500)
video = EmbedVideoField() # same like models.URLField()
stats = models.CharField(max_length=20)
class Meta:
verbose_name_plural = 'videos'
def __str__(self):
return self.category
views.py
class VideoResultsView(ListView):
model = Video
template_name = 'search_results.html'
def get_queryset(self):
query = self.request.GET.get('q')
video_list = Video.objects.filter(
Q(category__icontains=query) | Q(video_name__icontains=query)
)
return video_list
Hoping someone can point me in the right direction. Error Description

Answer 1

Found my answer.
<form class="form-inline my-1 my-lg-0" action="{% url 'search_results' %}" method="get">
<input name="q" type="text" placeholder="Search" aria-label="Search">
<a class="btn btn-secondary my-2 my-sm-0" href='/gymapp/videos/' type=submit>Search</a>
</form>
I shouldn't have used an tag for the button. Changed it to tag and now the query is working.
silly mistake.