Shooting indoors in low light is always a challange reguardless of Camera, DSLR or video, probably one of the toughest going. Be it still or video the trick is to know your camera & its capabilaties inside and out and knowing what you need to do to make it work in less then optimal conditions, This is where a complete working Knowledge of your camera comes into play(read the manual inside & out, I know Boreing). I have nothing against using auto modes, if fact I think many are great especially sports modes, I use the auto mode on my Canon A1 video camera quit a bit during many commercial shoots & weddings ,a: because it does a great job in most cases, and B; because it eases my work load when I am busy concetrating on the overall product and composition of the shoot. That being said I also Know the situations when Auto is not going to work and I need to switch over to manual mode, open the apeture , boost gain, manually focus, check peaking, change the white balance, ect ,ect, ect, That's what being a professional
videographer, photographer is all about, I guess What I am trying to say is learn your equipment & how to use it so that you can get the most out of it, in most cases you don't need a $3000 dollar top of the line camera to get the high quality shot you are looking for if you know what you need to do to get the shot you want and your camara has the ability to adjust to do it. That is the great thing about digital, you can experiment till the cows come home to find out what works & what doesn't and it really doesn't cost you anything but time. But Hey even with all the best equipment , lighting and gagets that you can possibly think of there are still times when you just are not gonna get the shot you are looking for, this is just the way it is.
So to answer your Question: Here's what to try, Open up the apeture setting to get in more light, go to your fastest or to a faster shutter speed, focus your camera on the obstical you are trying to capture the jump over, use the cross bar or the jump wings as a focus point, use a tripod for stability- This is a big one especilly if you are shooting from a distance, try to snap the shot a bit early to try and account for camera( shutter) lag,and try some more shots, good luck