RN
The word "treat" in the original title is doing something worth pulling apart. It casts a normal, extremely common feature of sleep as a condition — an inconvenience with a recommended remedy, and the remedy on offer happened to be a list of video links. Nothing about it needs treating. Most of what follows is just what bodies do while asleep, described plainly, because plainly described is not how anybody encounters it.
This is general information and not medical advice. Nothing here can substitute for a clinician who can ask you questions, and the section below on when to raise something is a pointer towards that conversation, not a replacement for it.
What is actually happening
Erections during sleep are a normal, recurring event rather than a reaction to anything. They occur across the night in association with sleep stages, in cycles, and they happen from infancy onwards — which by itself rules out arousal at the content you saw before bed as the explanation.
The one people notice is simply the last one, still present at the moment of waking. It has no special status. It is not evidence of a dream, not a signal about the night before, and not a measure of anything. The only thing that distinguishes it from the several that came earlier is that you were conscious for it.
Frequency and firmness vary, night to night and over a life. Sleep quality, alcohol, tiredness and a range of prescribed medicines are all things clinicians routinely ask about when this comes up, and age changes the pattern in ways that are ordinary rather than alarming.
When it is worth mentioning
A single night, or a stretch of nights, is not information. What clinicians tend to be interested in is a sustained change — a pattern that was steady and is not any more, particularly alongside difficulty at other times.
The reason it gets asked about is that it is one of the pieces of information used to tell apart different kinds of cause. It is a piece, not a test, and reading a self-administered version of it in either direction is how people end up either worrying about nothing or reassuring themselves past something. That is precisely the judgement that belongs to somebody who can take a history.
If the worry is more about performance and anxiety than about physiology, that is a different problem with a different shape, and our piece on bedroom anxiety covers it properly.
And the fifteen clips
They are gone. Every destination the original recommended was a free stream on an open platform, none could be located, and there is no version of that list worth rebuilding.
There is also less to the category than the framing suggested. "Morning sex" is a scenario tag, not a genre — a setting cue about bedrooms and daylight, applied by whoever uploaded the file. It gets you material of that shape from any site with a tag index, and the shape is the entire promise. Much of what carries the tag is amateur, which is where the setting cue is least stage-managed, and that is about as much of a recommendation as the tag can honestly support.