Upload a file from react to flask is not working - reactjs

Question

I'm trying to upload a video from react to flask but when I make a POST request it gives me this error
werkzeug.exceptions.BadRequestKeyError: 400 Bad Request: The browser (or proxy) sent a request that this server could not understand.
KeyError: 'file'
here is the backend:
#app.route("/releaseVideo",methods=["POST"])
def release():
request_data = request.files.get["file"]
print(request_data)
try:
request_data.save(os.path.join(app.config['UPLOAD_FOLDER'],'first video'))
except Exception:
print('COULD NOT')
return {"msg":"What am I DOING"},200
if __name__ == '__main__':
app.run(debug=True)
Here is the front end...I'm using axios instead of fetch because I heard that axios is better for file uploads than fetch .
const upload_file = (event) => {
event.preventDefault()
let file = document.querySelector('input[type="file"]')
const formdata = new FormData()
formdata.append("file",file);
axios("/releaseVideo", {
method:'POST',
body:formdata
})
.then(res => console.log(res))
.catch(err => console.warn(err));
}
return (
<>
<form onSubmit={upload_file}>
<label>Title: </label><br />
<input type="text" onChange={onTitleChange} value={title}/><br />
<label>Description:</label><br />
<textarea value={textArea} onChange={onTextAreaChange}></textarea>
<input type="file" id="file"/>
<input type="submit" value="Upload Video!" />
</form>
</>
)
So how can I get the video from the front end in a proper way?