Keywords: well (palm up gesture), umm, err, yeah

Found 2 variants for this sign (click on video to enlarge):

Sign Definition

Interactive

1. Used alone when you mean what you are about to say is easily understood or easy for anyone to agree with given the context, or that it is easy to understand or agree with what the person you have been talking to has said given the context. English = 'Well...', 'Well, there you are...', 'Well, there you go...', 'That's all there is to it...', 'That's it...', 'Yeah...', 'Yep...', 'Yep, of course...', and so on.
2. Used alone when you are hesitating, usually because you have not decided what to say next. It also means you don't mind if the person you are talking to interrupts or takes over. English = 'Well...', 'Umm...', 'Err...', and so on.

As Question

1. Used alone as general question sign to suggest that one or more questions (who, what, where, why, how, or when) could be asked about what has just been said by either the signer or the addressee, depending on the context. For example, “Who would do such a thing...?”, “Why would anyone do that...?”, “Where’s that...?”, “How exactly did that happen...?’, and so on.

Note

1. This sign form and its variants occur very frequently in fluent signing. They are often brief and carry very little, if any, meaning. Essentially, they are simply momentary resting positions of the hands between signs or clauses. However, when the hands are held for slightly longer (yet even then they can be quite brief), are made with eye-contact with the addressee, with a degree of stress, or with various facial expressions, they convey the types of meanings described here.
2. Apologies for the temporary line drawing. It will be replaced with a video clip as soon as possible.