i have download helper but it no longer seems to recognise you tube videos. I have paid £28.00 for a licence and can not use it. Can you tell me why

You should contact download helper since that is their program Addon that's a Mozilla product.

cna you tell me why Down load helper no longer seems to work. when I first open a pge the download icon appears in full colour and then fades to grey and won't recognise you tube videos is this something you can fix

The support forum place for this VDH extension is at https://github.com/aclap-dev/video-downloadhelper/discussions

If you are having issues with downloading from Youtube for example then there is a Beta version of VDH being tested https://github.com/aclap-dev/video-downloadhelper/discussions/1074#discussioncomment-11914403

You should contact download helper since that is their program Addon that's a Mozilla product.

No it is not a Mozilla product and you need to check your post before submitting posts in quantity when it should be quality.

I recently encountered an issue with the Video Download Helper on Firefox. The extension has stopped working specifically for YouTube videos, and the toolbar icon remains grey (inactive). Interestingly, when I tested it with a video from a LinkedIn web page, the icon turned active, and I could download it successfully.

I purchased the license for Video Download Helper just a few weeks ago, and it worked perfectly for two weeks before this issue arose. Could you please assist me in resolving this problem?

Thank you for your time and guidance. I look forward to your suggestions.

Could you please assist me in resolving this problem?

There is a Beta version of the extension as I mentioned in reply above yours.