Personally I wouldn’t touch hacked software as there is often other ‘embedded features’ that you really don’t want. The same goes for download sites. Some software will offfer a trial period that you can use. Sign up with different email addresses and if you can spoof the IP address that may be worth a go.
Older stand alone versions of Premier can be got quite cheap (not free I know) but perfectly functional.
Not in the buisness but if you work into there should be a free version of black magic design davinci resolve --- Post updated ---
If it isnt supporting the video format you want you can read into ffmpeg all advanced stuff but once you understood it you got it