I use Bandicam but the trial version is rather limited, however paid licences are very reasonably priced, depending on what you think 'reasonable' is. (We've got it licensed on three PCs in the house.)
The full version is $39, whatever that works out to in real money.
Holy shitballs Camtasia is £249! Maybe give Bandicam a go and see if you like it? If you decide to license it you just apply the licence code to the already installed trial version.https://www.bandicam.com/buy/