First things first, check you are on the latest firmware revision. Menu >> Settings >> System >> System Information. Software Version should read 1.02.20.
Chase Play: I don't understand your problem. While something is recording, press "Media", then navigate to the recording. If it is part of a series recording, it will be in its own folder under My Video, if not part of a series recording then it will be immediately under My Video. If it is being actively recorded it will be identified with a red dot. Having moved the cursor to highlight the recording, press "OK" and you will have a menu pop up with "Play from the start" as the only available option; alternatively press the play button on the RC handset and it will play from the start immediately. If this is not what you find, there is a problem somewhere.
What's wrong with having a volume control? Nobody says you have to use it, and you can easily press the "TV" button on the handset to control the TV volume instead. The general advice is to set the Humax volume to 20 (it goes to more than 11) and then control the final volume using whatever is generating the final sound (TV or amp). I use the Humax volume control when watching via my projector, because it is more convenient to set the projector to max and use the Humax to reduce it. If you get a Logitec Harmony universal remote control, you can program it to control the TV volume whatever mode the handset is in.
BH