I think this is a pretty cool idea. If you're new to the mod, watching players who know what they are doing will help you pick up a lot of things you didn't even know you were missing out on!
As a suggestion, maybe you could add notes to the video. Annotations on youtube is probably easier than editing the video. Just a few sentences saying "he survived because he did this thing. here is how to do it: words words words"
You don't need to spawn with no weapon and die to spectate, you know. You can just chose "spectate" instead of a team and record people right from the start of the round...