What I advocate is using a Black Video synthetic clip to create a fade in or fade out. Most of the time, it’s not an issue, but I’ve seen it before… As described above, you can probably see why this would be the case. While in most cases you can achieve the result you want–a fade to or from black–using a cross dissolve as you’ve outlined, this can cause problems when you export to a format/codec that supports alpha/transparency. A Premiere Pro sequence is 100% alpha when the frame dimensions are not completely filled with 100% opaque clips you can see this by changing the Display Mode to Alpha and placing a clip that has smaller dimensions than the sequence into the sequence. If you use a cross dissolve on a base video layer to fade in or out to black, you’re actually dissolving to or from transparency. Strictly speaking, a Fade To/From Black is exactly that: a fade TO or FROM black. However, I don’t agree with you on using a cross dissolve as a single-side transition to achieve a fade in or fade out. I understand your point on transitions, particularly Dips and Fades.
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