Express Scribe (free version) - does not support video files
Express Scribe Pro (one-time fee of $29.99) - supports mostly all file formats, including video files
A foot pedal is not required to work for us. We have many transcriptionists who successfully transcribe without a foot pedal. You can control the audio with hotkeys on your keyboard if you don't have a foot pedal. That said, we do recommend a foot pedal if you can afford one. A foot pedal costs about $50 on Amazon, and we recommend the Infinity brand.