How do i videos from youtube onto my mp4 GoGear ViBE player???

Dowload youtube videos using sites like
www.keepvid.com
just copy n paste the video url in this site and hit download...
u can download the videos in mp4 format itself...
Done...

enjoy

Hope this helped

It is recommended to use a software to do that. You could just use Leawo Free YouTube Downloader. It is very easy to download videos from YouTube and other video sharing websites with this software.
And this is tutorial for converting YouTube videos to MP4 - http://www.leawo.com/video/youtube-mp4.html

Sometimes you might want to download YouTube videos to MP4 on your computer, especially for those long-form videos that might take up a lot of storage. Here comes the CleverGet, the most professional video downloader that can help you download YouTube to MP4 on PC. With CleverGet, you can download videos, TV shows, live stream videos, and videos from 1000+ websites, including YouTube, Twitter, Instagram, and many more!
Here in this article, you can find more options.

Article:How to Download YouTube to MP4?

This Free YouTube Converter is what you need, it can help you download YouTube video and convert the video to mp4, and then you can upload the video to your gogear.
Best Free YouTube Downloader YouTube Converter and YouTube Player

Download videos off youtube with Firefox addon - "VideoDownloadHelper" and convert the videos to mp4 using AppGeeker video converter.
Check the source: How to convert flv to mp4 on mac or windows

Most of the videos you download from the internet are flv files, if you want to open it with your mp4 player, you may want to use free flv to mp4 converter

Convert Youtube FLV and other Flash FLV videos to almost all video and audio formats including FLV to MP4, FLV to AVI, FLV to WMV, FLV to SWF, FLV to MOV, FLV to MP3, etc.
Powerful FLV Editing Functions supported by the FLV to MP4 Converter:Merge, trim, crop, effect and watermark video http://www.flvtomp4free.com/