Thanks very much for your reply. After reading another post of yourself regarding download percentages going backwards why?, I figured it out that LW is trying to redownload the corrupted files.
My files are not 100% complete. Some part of the videos are missing. What I do not understand is out my five downloads, all of them have got many KB in lost for corruption. I could understand that one or two files could be corrupted but not all of them. Please can you clarify my on that. And presently I have one file continuing downloading but remaining stuck at 92% but still continuing downloading and the figures in the lost for corruption is increasing. Same situation for the others files at respectively 20 32 44 and 9. Should I stop them and forget about the files or there is maybe a chance to succeed?
Really appreciated that you are taking of your time to help me out. Thanks once more

Tough call. If they are not complete then you can try to continue. In meantime see if there are alternatives to download.

I almost always continue them. They do often complete eventually during one of the redownload attempts, at least in my experience. Question is why does the download hash not equate to the actual file. Was it data loss during transfer, data corrupted during transfer, even possibly via some security device on your computer or a disk drive that is badly fragmented, ... or was some of the data changed in the original such as information tag or something. Some files are corrupt at the source, not sure if that's due to the file itself or something between me & them that corrupts the file transfer.