Can I use my work photos on my personal website?

You added probably the most important piece of information in a comment. You are in the UK.

The UK government has a website about this: https://www.gov.uk/intellectual-property-an-overview

It quite clearly states:

You usually will not own the intellectual property for something you created as part of your work while you were employed by someone else.

Simply put, NO; it is not OK for you to use the images.

You own no rights to the images/videos you create as an employee; the employer owns them. And there is nothing in your contract about it because it is settled law in the UK.

The Copyright, Designs, and Patents Act 1988 (https://www.legislation.gov.uk/ukpga/1988/48/contents)

11 First ownership of copyright.

(1)The author of a work is the first owner of any copyright in it, subject to the following provisions.

(2)Where a literary, dramatic, musical or artistic work [F1, or a film,] is made by an employee in the course of his employment, his employer is the first owner of any copyright in the work subject to any agreement to the contrary.

So you need an agreement with your employer allowing you to use the images/videos (in writing). And there are legitimate reasons why they might not want to release those rights.

They're owned by your employer, so not without their explicit permission.