I have been working hard, and voila! You may now find resources and videos for catechesis on Holy Week and the Easter Triduum on this blog's companion site, The Liturgical Catechist. Check it out for resources about Palm Sunday, Holy Thursday, Good Friday and the Easter Vigil. There is a wealth of great stuff, including videos from noted liturgical experts and Pope Emeritus Benedict XVI.
Please use these to help catechists, students and adults understand the significance and "flow" of these liturgies, which are the pinnacle of the Church Year. I hope you find the site is becoming increasingly useful. Feedback is good, too. Let me know how you use what you find there.