Quality and download times – you have to trade these off of course.
Have you considered hosting your reels here in the COW’s reels section ..?
Currently Flash is very popular for playing video on the web. You could encode your videos to Adobe’s licenced VP6 format or to MP4. I don’t know if iWeb makes it easy to add Flash movies (e.g. YouTube movies), but the links below might help. If you do go for a Quicktime player for the vbideo in your web page, people with Macs should have no trouble viewing it, though a lot of Windows and other users do not have a QT plugin installed.
With Flash, you will be inserting at least two files into your web hosting service – a video player of some sort, which is a .swf file and which you place on your page, and then the video itlself, which could be either an .flv, .mp4 or .h264 file. .
https://en.wikipedia.org/wiki/Flash_Video
https://iwebfaq.org/site/iWeb_Movies.html
https://www.verticalmoon.com/tutorials/general/iweb/iweb.htm
https://www.geniusdv.com/news_and_tutorials/2009/01/embed_flash_video_flv_in_iweb_part_2.php
https://iwebunlimited.com/iwebtips/Entries/2008/10/1_9-_Flash_Video_in_iWeb_(using_Longtail_Video_JW_Player).html
https://flowplayer.org/
https://www.longtailvideo.com/support/forum/Setup-Problems/15183/iweb-08-