I would recommend you to download hilarious pet videos from websites like youtube, dailymotion, metacafe, hulu or break.
There you can find wide range of hilarious pet videos, just type "hilarious videos" in search box and you will find lots of hilarious pet videos.
You may download such videos by using "flash video downloader" just go to the website of flashvideodownloader and install the extension according to the browser that you are using(I would suggest you to use Opera for downloading)
After installing the extension of flash video downloader, go to the website from where you want to download videos, using your browser with flash video downloader extension installed, now click on the video that you wish to download, and when your video starts buffering, then click on the icon of Flash Video Downloader, (an arrow button which now appears on the top at right hand side of your browser), it will start downloading the desired video file, once the video starts downloading you may close the window in which the video is buffering to get better downloading speed.
Hope this helps you out.
