上传到youtube

I am doing an application where in I upload some videos to S3 (public mode). Then I want to schedule a job which will be given the S3 link and it needs to upload the video to youtube using one particular account.

How can I do that?

I am using PHP as the language (Gearman for background task processing). I need help in uploading to youtube. Is there some resource where I can find out how to do this ?

You should go directly here, and check what suits best your needs. I guess you should consider Direct Uploading. Scheduling a job may be achieved with cron jobs (crontab -e on linux). More details about crontab here.