as rapier states so well, definitely use layer masks. break your dependence on the lasso tool - it isn't accurate enough and making tweaks isn't as easy. layer masks give you the most flexibility and control.
learning how to cut a mask using the pen tool (aka "clipping path") is also a good skill to learn but perhaps not widely used in video (print, hell yeah). the advantage here is that a path is editable at any time and takes up virtually no space (a few kilobytes at most) in the file while a mask layer or alpha channel takes up many more megabytes. of course, a path is a hard-edged selection by default so you have to think about that, too.
you can also get quick rough masks by using a Select > Color Range and then refine as a layer mask - saves a TON of time!
Or press "Q" and enter Quick Mask mode and just paint your mask...
yes, 15 different ways...
learning how to cut a mask using the pen tool (aka "clipping path") is also a good skill to learn but perhaps not widely used in video (print, hell yeah). the advantage here is that a path is editable at any time and takes up virtually no space (a few kilobytes at most) in the file while a mask layer or alpha channel takes up many more megabytes. of course, a path is a hard-edged selection by default so you have to think about that, too.
you can also get quick rough masks by using a Select > Color Range and then refine as a layer mask - saves a TON of time!
Or press "Q" and enter Quick Mask mode and just paint your mask...
yes, 15 different ways...