Over 10 minutes? Wow, my attention span doesn’t last that long anyway. I find at least for me, that anything longer then 5 minutes of flying without a sound track (music) is too long.
Lately, I try to keep the length no longer then 2 1/2 minutes if it’s just a flying video without music.
If it’s a landing, most people are interested in the landing aspect so for me, as of late, base to final to landing is the most I include.
Of course you are talking an instrument approach and even on my instrument approaches in IMC, I only include from the final approach fix (FAF) to landing as anything longer really stretches the attention span for me. Average time I find from the final approach fix to landing is about 3 to 4 minutes.
If you are talking a problem with file size, then what I do is create a WMV file in Windows Movie Maker and compress it below the 100 meg limit.
BTW, You Tube now allows up to 1 Gig in prep for higher resolution videos, but I think the 10 minute 59 second rule still applies.