I've used the below in the past, works well but maybe a little laggy on slower pc's. https://www.apowersoft.com/free-online-screen-recorder
I've had good luck with Ashampoo's free version. They can spam email a bit though so you may want to consider a that if giving them your email https://www.ashampoo.com/en/usd/pin/2124/multimedia-software/Ashampoo-Snap-2018
Sometimes, I use the free version of Bandicam but it has an obvious watermark at the top. The Apowersoft, does it have a watermark?
I can't honestly say if it has a watermark, as I last used it several months ago on a previous PC, so I have no recordings to view. As far as I recall it does not have a watermark though, but again, I could be wrong. It works well though, I used it to record online presentations.
Limits of the free version = Record time limit: 5min / Watermark / Output VIdeo format: WEBM / [...] More info: https://icecreamapps.com/Screen-Recorder/upgrade.html
never tried it on windows 8.xx but it worked on windows 7(64 bit but 32 also works) onwards without a problem and is very light on resources fastone capture https://www.faststone.org/FSCaptureDetail.htm
What happens to the screen recorded video's that get saved after the trial for Camtasia - do they let you view those after the expiry (if you don't buy)? Any idea the max screen recording time during the trial?