Anything on a tripod. So many video's i've seen ruined with a person who has the urge to move around filming like a crazy person... like I don't care that you decided you needed a close up on her feet, while her upperbody tickling just got serious.
Plus Tickling video are already chaotic and shaky, stable camera lets you focus on just that. To that point, camera angles that show the area getting tickled are great... I've seen some where they keep the camera at the foot of the bed, while they go and spend minutes on their sides which now is difficult to see, and the ler gets the in the way.
Now a days some producers are getting better at dual cameras, so you can say for example zoom in on their feet, but also have a small picture-in-picture of their face so you can see their reactions as well. Always skipped forward when producers zoomed way too far in and you miss their genuine reactions.
I feel the older producers like RealTickling had the formula correct, sort of segmented and purpose driven tickling scenes based on where the Lee was getting tickled. Silvercherry and FrenchTickling still do this, and i feel it makes navigating the videos way easier.