Avisynth reviving old scripts

[Leo48]

Hi everybody, long time no see.
As a newbie, years ago I had produced some simple AviSynth scripts, extension *.avs. Last time I ran them was in WinXP, I guess.
Recently I found them again, but can't run them with VirtualDub(Mod) any more in Win10 Pro 64bit.
Getting errors like "DirectShowSource: cannot open as video or audio".
Would be grateful to anybody who can give me some clues.
TIA Leo

[Skiller]

Avoid DirectShowSource.
It fails probably due to some Codec that is missing.

Better use something like FFmpegSource, AviSource, MPEG2Source, DGSource etc. depending on the video format.

[Leo48]

Thank you. That's what I suspected. But then I need more help: which plugins do I have to get, and where to place them?
Within the Avisynth or the Vdub plugins subdir?
And talking about "depending on the video format", which one to use for quicktime (*.mov) files?