Thanks. For clips, I would suggest using CRF 18. If you try to do it based on a large size for small clips, the bit rate may be way too high. I tried this last night for the short clip and it made a 400mb file that stuttered and had glitches. When the clip is much longer, the bit rate is within reasonable limits.
For the whole movie, you could try it both ways or any combination of ways to see what gives the best results. I am a fan of not filtering out stuff to make the file size smaller. With the 2 pass size restricted method, it uses a variable bit rate and will use more bandwidth only when needed and probably give you the best overall experience.
Tonight I will re-encode it again with CRF 18 and post it again.
Mike