My opinion on good "e" videos: they are few and far between. I turn off many of them because they are so very poor. Frankly, the best source is our own "links," because these are pre-warched by some of our own members, and while we all have different tastes, most of us do know what an enema is.
Some of my own favorites:
Some of the videos by water and power on xvideos; he's fairly sadistic, and I don't share his love for the glass syringe;
Several of the "Everything Butt" videos;
*some* of the insex videos. Definitely not for you if you're not into punishment and suffering.
A few of the "into the attic" videos (several of these have good enema scenes that may be real).
Beth Tyler videos, though most of those have gotten pretty old.
Some of the old gyno fetish dreams videos. If they have enemas in them, they look real.
My favorite sites for enema videos (ranked according to usefulness for me personally):
1. Eroprofile. Several of the posters find stuff I've not seen elsewhere.
2. Xvideos and Xhamster. Most all videos appear there, but not all
3. Pornhub& affiliates. Apparently gun videos there now, too...
My favorite enema video search engine: Bing.
I usually set my search parameters to look for newest, and then suffer through the irrelevant and stupid ones ("shapely lezzies fill their gigantic, monstrous asses with milk by the gallon."). Sometimes it's like eating a chicken wing: a lot of work for very little meat.
I sometimes also set my search to look for longest videos, because some videos, esp. Bdsm videos, include enemas as part of the play, but they are not the only thing shown.
I find the studios' concept of what constitutes a good enema video at once hilarious, depressing, and insulting.
Then there are the "scat" videos. Ugh. I do like to see the girl on the toilet and hear the "results"--unless the soundtrack is faked, you can tell if the enema was real. Besides. The look of relief, the reaction to cramps, you can see "how it all comes out." Don't like the s**t, though. Not at all. Makes the entire video a new kind of crappy.
So that's my 2 cents' worth. Remember, advice is usually worth less than you paid...