1) Shoot 1080p60, export 60p and upload to YouTube. Let YouTube adjust frame rate as it sees fit, it will re-encode with variable frame rate (VFR) which may peak at 60 fps, but usually averages at about 30 fps.
2) Shoot 1080p60, export 30p. Ensure no frame blending occurs, instead ensure that your NLE drops every other frame. Yes, the video will be more choppy than 60p, but at least each frame will be reasonably sharp with no ghosting.
3) Shoot interlaced, export 30p by dropping every other field. Do not blend fields. In Vegas this means "deinterlacing: interpolate".
To minimize strobing and stuttering move the camera slowly, reduce shutter speed (normal shutter speed for 60p and 30i/60i is 1/60 s^-1), reduce DOF by opening the iris, use ND filter when appropriate.