Just discoverd a tool and didn't see it mentioned here, so I thought I'd share
LosslessCut

It allows you to cut, split, merge videos without any reencoding / quality loss. It's a wrapper for FFmpeg and very user freindly.

I've used it to remove sections from videos (e.g. embedded ads :weep ...

Replaced the link to the video. Now this is a complete video, but with ads. A lot of ads. For those who are too lazy to return to the first post, here is the link:

https://mega.nz/file/xhAEgTKK#5Zm0DkHvjo1SJbGBoeuy2rUGaBFJ90d2VunhOyB1Z_4

And the second thing. There are so few survey participants ...