What software is there to remove watermarks for free?

At present, there are some softwares with good watermarks on the market, such as cutting and pasting, snapshots and so on. These two are completely free video editing and production software, dubbing and special effects. However, the biggest difference from the paid watermarking software is that they will change the size of the original video to cut it, while some software that needs money directly keeps the size of the original video. I believe these two softwares can help you in daily video production and editing, especially in cutting and removing watermarks.