Roughly, a movie will be around 600-700 MB.

Always check a video file with Bitzi before download. If the file's been rated then you'll get some idea of it's quality & content. If the file hasn't been rated but you want to chance it, preview the download after about 10%

Movies in mpeg4 & H264 format will transfer to iPod. You can download other formats & then convert them to the right format for iPod...but for that you'll need a converter program. If you search the forum for video to iPod, you'll find lots of threads & more info.