I'll give some tips. I had dabbled in tickle videos about ten years ago (see clips for sale under my user name (<== yes, shameless plug) and I found it very hard to compete. Still, I can tell you what I like to see in a video, even though I was unable to put everything I like in my own videos.
I like close shots. If you can see the entire girl in the shot, then it is too far away. Oh sure have a few establishing shots, but zoom in for most of the action. Best view for me is from the head to the upper thighs. Put the camera on a tripod. You can change the view by moving the tripod, but don't hold the camera in your hands and move it around while filming, this creates a very distracting view. For me her facial reactions to the tickling are as key as the tickling itself.
Tie the girl securely. I like as little movement as possible, but strangely enough, I prefer that she looks comfortable. I personally like to see her strapped down tight on a cushioned table, hands stretched above her head, legs open or closed and feet secure in stocks. Tickle Abuse is my favorite producer for both camera views and that bondage table.
As for the girl, well, being older I guess, I am not fond of tattoos. I know that most ladies who would agree to this kind of exercise have them, so I make appropriate allowances. Since my favorite spot to attack is the belly, I definitely do not like tattoos there, but again, allowances are made. I really hate navel jewelry, especially the goddam chandeliers that some girls wear in their navels. I automatically pass on most videos with models with navel jewelry (sorry Tickle Abuse), so get the model to remove them if possible.
For me, nudity is enjoyable, but a bikini or bra and panties is just as good. I mostly like to see the bare belly. Starting her clothed, then stripping her while she is tied is very exciting.
I like a gag and or a blindfold, but I also have to see her face during the video. Don't leave her face obscured during the entire video. If she insists on being unidentifiable, she is the wrong model.
You know where to tickle, I assume, but many don't tickle my favorite spot, which is the navel. Usually if they do, it is just a smidge. I like concentrated navel abuse with different weapons. Also don't just follow a script. Tickle only where she is ticklish. This is a hunt, you are looking for her most ticklish spot. If she falls silent on a spot, then keep looking. If she screams on another spot, then stay there a while. Be thorough and merciless. You should be paying her enough to do this. If she is nude and agrees to this, tickle her breasts and her vagina area. I found out that some girls have very ticklish clits after orgasm. The Bondage Channel has some video of girls being brought to orgasm, tickled on the clit until the sensations subside, then brought to orgasm for more clit tickling. Rinse, repeat.
Finally, she must be truly ticklish. Most of us can spot a fake. Even I had one who was good, but I suspected a fake. Still I put the video up for sale and hers sold the least. I like a good, real laugh. See Paradise Visions 'Miranda' or 'Jessica'. They acquired these films from a guy who hired models to be tied, but didn't tell them they would be tickled. To me, their laughter is priceless, though others are offended at 'non-consentual' tickling. Funny thing is that a lot of models who consent to be tickled, aren't ticklish. Nevertheless, if you can manage any 'non-consentual' tickling videos, I will buy them no matter what the girl looks like.
Anyway, enough of that. I hope this helps and GOOD LUCK.