I use ShareX for screenshots or screen recording!

It's totally free in my experience. A client recommended it to me :)

https://getsharex.com/

Edit: I see you meant like a portfolio area, there are lots of options you could use muckrack for writing articles which journalists use. I have my website and generally just send specific samples to clients when I get gigs as opposed to a large portfolio.

If I did then I would likely just add a portfolio section to my website. Hope that helps!