Verified answer

A video is most likely too large an attachment for Yahoo's 25 MB limit. For most attachments, click Attach, Browse for files ..., click to highlight, Open and Attach.

For large files, here's a partial list of free services which allow sending files of 50 Mb or even 1 Gb.

MailBigFile - Send files of up to 1Gb (= 1000 MB) for free.

http://www.mailbigfile.com/

SendTool - Send files of any type for free (max file size is 800MB).

http://sendtool.com/

Transfer Big Files - Send files of up to 1Gb (= 1000 MB) for free.

https://www.transferbigfiles.com/

YouSendIt Free service - Send very large mails (attachments, up to 1 Gb = 1000 Mb).

https://www.yousendit.com/

You can send it as an attachment :D

Or as a link (if it's a YouTube video or something like that)

Hope that helps!

If it is too big to attach to an email try one of the large file sharing sites like TransferBigFiles.com or YouSendIt.com or Box.net.

yahoo! messenger file sharing